WO2015199081A1 - クイックカプラ - Google Patents
クイックカプラ Download PDFInfo
- Publication number
- WO2015199081A1 WO2015199081A1 PCT/JP2015/068061 JP2015068061W WO2015199081A1 WO 2015199081 A1 WO2015199081 A1 WO 2015199081A1 JP 2015068061 W JP2015068061 W JP 2015068061W WO 2015199081 A1 WO2015199081 A1 WO 2015199081A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hook
- hydraulic cylinder
- lock
- pin
- quick coupler
- Prior art date
Links
- 230000008602 contraction Effects 0.000 claims description 49
- 230000002093 peripheral effect Effects 0.000 description 23
- 239000010720 hydraulic oil Substances 0.000 description 13
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3618—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with two separating hooks
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3622—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a locking element acting on a pin
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3627—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a longitudinal locking element
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/365—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with redundant latching means, e.g. for safety purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2271—Actuators and supports therefor and protection therefor
Definitions
- the present invention relates to a quick coupler.
- a quick coupler is known as a component for easily attaching such an attachment to a work vehicle.
- the quick coupler is attached to the work vehicle.
- a quick coupler has a fixed hook and a movable hook, and these hooks engage with two pins provided on the attachment, whereby the attachment becomes a quick coupler. Connected.
- a lock member for preventing the pin from coming off from the hook is provided.
- a lock pin is inserted into a boss provided on a movable hook, thereby preventing the pin from coming off from the hook.
- the first arm and the second arm are attached so as to be able to swing with respect to each other via a support pin.
- a hydraulic cylinder is attached across the first arm and the second arm. The extension of the hydraulic cylinder increases the distance between the first arm and the second arm, thereby connecting the first arm and the second arm to the pin of the attachment. Further, when the hydraulic cylinder extends, the hydraulic cylinder rotates so as to be horizontal. The lock member rotates together with the rotation of the hydraulic cylinder, thereby preventing the lock member from coming off.
- the quick coupler disclosed in Patent Document 2 can automatically act as a retaining member by a lock member when the attachment is attached.
- a large operation of rotating the hydraulic cylinder is required. Therefore, there is a problem that the quick coupler is increased in size.
- An object of the present invention is to provide a quick coupler that can automatically function as a retaining member by a lock member when an attachment is attached and can be downsized.
- the quick coupler includes a coupler main body, a lock member, a second hook, a hydraulic cylinder, and a connecting pin.
- the coupler body has a first hook.
- the lock member is provided so as to be movable between a lock-on position and a lock-off position. In the lock-on position, the locking member protrudes into the opening of the first hook. In the lock-off position, the lock member is retracted from the lock-on position.
- the second hook is provided to be slidable with respect to the coupler main body.
- the hydraulic cylinder has a first end connected to the coupler body and a second end connected to the second hook. The hydraulic cylinder slides the second hook away from the first hook by extending.
- the hydraulic cylinder contracts to slide the second hook closer to the first hook.
- the connecting pin connects the first end of the hydraulic cylinder and the coupler body.
- the coupler main body has a support hole. The support hole movably supports the connecting pin in the expansion / contraction direction of the hydraulic cylinder. The first end of the hydraulic cylinder moves away from the second end within the movable range of the connecting pin, thereby moving the lock member from the lock-off position to the lock-on position.
- the quick coupler when the hydraulic cylinder extends, the second end of the hydraulic cylinder moves away from the first end. As a result, the second hook slides away from the first hook. As a result, each of the first hook and the second hook is locked to the pin of the attachment, and the attachment is attached to the quick coupler.
- the support hole of the coupler body movably supports the connecting pin in the expansion / contraction direction of the hydraulic cylinder. For this reason, when the hydraulic cylinder extends, the first end of the hydraulic cylinder also moves away from the second end within the movable range of the connecting pin. With the movement of the first end portion, the lock member moves from the lock-off position to the lock-on position.
- the retaining function by the lock member can be automatically activated when the attachment is attached. Further, by moving the first end portion of the hydraulic cylinder within the movable range of the connecting pin, a retaining function by the lock member acts. Therefore, the retaining function by the lock member can be applied with a small movement of the first end. For this reason, a quick coupler can be reduced in size.
- the support hole is a long hole extending along the expansion / contraction direction of the hydraulic cylinder.
- the first end portion can move in the expansion / contraction direction of the hydraulic cylinder along the long hole, thereby allowing a locking function by the lock member to act. For this reason, the structure of the quick coupler can be simplified.
- the quick coupler is a quick coupler for attaching an attachment via the first pin and the second pin
- the coupler main body further includes a pin retaining portion.
- the pin retaining portion is disposed to face the opening of the second hook. With the second hook locked to the second pin, the width of the gap between the tip of the second hook and the pin retaining portion is narrower than the diameter of the second pin.
- the quick coupler further includes a biasing member.
- the biasing member biases the second end so that the second end is separated from the first end.
- the state where the second hook is locked to the pin is maintained by the biasing member.
- a lock member is hold
- the biasing member is disposed in the hydraulic cylinder. In this case, it is possible to prevent the biasing member from coming into contact with another member such as a hydraulic pipe around the hydraulic cylinder during the operation of the quick coupler.
- the quick coupler further includes an elastic member inserted into the support hole.
- an elastic member inserted into the support hole.
- the first end portion moves, it receives resistance due to the elastic force of the elastic member.
- the timing of the operation or release of the retaining function by the lock member can be adjusted.
- the lock member has a proximal end portion, a distal end portion, and a recessed portion.
- the proximal end portion is rotatably supported with respect to the coupler main body.
- the tip protrudes into the opening of the first hook at the lock-on position.
- the concave portion is located between the proximal end portion and the distal end portion.
- the first end of the hydraulic cylinder has a protrusion that protrudes toward the lock member.
- the lock member is located at the lock-off position in a state where the convex portion is located in the concave portion.
- the lock member can be positioned at the lock-off position by arranging the first end portion at a position where the convex portion is located in the concave portion.
- the lock member has an inclined surface connected to the recess.
- the inclined surface is disposed in a direction from the second end toward the first end with respect to the recess.
- the coupler main body has a wall portion.
- a wall part is arrange
- the hydraulic cylinder remains in the coupler main body by the wall portion. For this reason, it is prevented that the pin of the attachment comes off from the first hook and the second hook. This can prevent the attachment from falling off.
- the first end portion of the hydraulic cylinder moves so as to approach the second end portion within the movable range of the connecting pin, thereby moving the lock member from the lock-on position to the lock-off position.
- the retaining function by the lock member can be automatically released.
- the retaining function by the lock member is released by moving the first end of the hydraulic cylinder within the movable range of the connecting pin. Therefore, the retaining function by the lock member can be released with a small movement of the first end. For this reason, a quick coupler can be reduced in size.
- the second hook has a protrusion.
- the coupler main body has a groove in which the protrusion is disposed. As the protrusion moves along the groove, the second hook slides relative to the coupler body.
- a stopper member for preventing the second hook from coming off is attached to the groove. In this case, the second hook can be more securely retained.
- a hydraulic cylinder is provided with a spring, and when the hydraulic oil is not supplied, the position of the piston rod is held at a predetermined position by the force of the spring.
- the spring is compressed and the piston is compressed.
- the rod is contracted (for example, see Japanese Patent Application Laid-Open No. 05-256307).
- a spring is disposed on the outer periphery of the piston rod via a spring seat.
- the spring seats are disposed at both ends of the spring, and are provided to prevent the spring from being compressed too much.
- the spring seat that receives the spring is disposed, so that the spring can be contracted only to the position where the two spring seats are in contact with each other, and a loss occurs in the contraction margin. .
- the hydraulic cylinder according to this aspect may include the following features.
- the hydraulic cylinder includes a cylinder tube, a piston rod, a piston, and a spring member.
- the piston rod is inserted into the cylinder tube so that the longitudinal direction is along the expansion / contraction direction.
- the piston is fixed to the piston rod and slides in the cylinder tube.
- a spring member is arrange
- the piston rod has an opening on the end surface on the contraction direction side, and an inner space is formed from the opening toward the extending direction. The spring member is inserted into the inner space.
- the hydraulic cylinder according to this aspect can provide a hydraulic cylinder that is compact and capable of obtaining a large stroke.
- a cylindrical guide member is further provided.
- the spring member is coiled.
- the guide member is disposed on the inner side of the spring member so that the longitudinal direction is along the expansion / contraction direction.
- One end of the guide member is held on the bottom surface of the cylinder tube facing the end surface of the piston rod.
- At least one end side of the guide member has a cylindrical shape.
- the cylinder tube has a protruding portion that protrudes in the extending direction from the bottom surface.
- One end of the guide member is held on the bottom surface by fitting the protruding portion inside the cylindrical shape.
- the spring member is coiled. In the state where the hydraulic cylinder is most extended, the length of the spring member is shorter than the natural length.
- the hydraulic cylinder further includes a ring-shaped member.
- the ring-shaped member is disposed between the outer peripheral surface of the guide member and the inner peripheral surface of the inner space, and slides on the outer peripheral surface and the inner peripheral surface.
- the spring member is divided into a first spring member and a second spring member with a ring-shaped member interposed therebetween.
- the guide member has a protrusion protruding outward in the radial direction.
- the end of the first spring member on the extension direction side is in contact with the inner surface of the inner space on the extension direction side.
- the end of the second spring member on the contraction direction side is in contact with the protrusion.
- the guide member is formed integrally with the bottom surface.
- the spring member is coiled.
- the cylinder tube has a protruding portion protruding in the extending direction from the bottom surface facing the end surface of the piston rod.
- the protrusion is fitted inside the end of the spring member.
- a quick coupler that can automatically function as a retaining member by a lock member when an attachment is attached and can be downsized.
- FIG. 1 is a perspective view of a quick coupler according to a first embodiment. It is an exploded view of the quick coupler which concerns on 1st Embodiment. It is side surface sectional drawing which shows schematic structure inside the quick coupler which concerns on 1st Embodiment. It is side surface sectional drawing which shows schematic structure inside the quick coupler which concerns on 1st Embodiment. It is side surface sectional drawing which shows schematic structure inside the quick coupler which concerns on 1st Embodiment. It is side surface sectional drawing which shows schematic structure inside the quick coupler which concerns on 1st Embodiment. It is side surface sectional drawing which shows schematic structure inside the quick coupler which concerns on 1st Embodiment. It is side surface sectional drawing which shows schematic structure inside the quick coupler which concerns on 1st Embodiment.
- FIG. 1 is a side view showing a part of a work vehicle 100 to which a quick coupler 1 according to the first embodiment is mounted.
- the work vehicle 100 is, for example, a hydraulic excavator.
- the work vehicle 100 is not limited to a hydraulic excavator, and may be another work vehicle.
- the work vehicle 100 includes an arm 101, a link member 102, and an attachment 103.
- a bucket is illustrated as an example of the attachment 103, but the attachment 103 is not limited to the bucket, and may be another attachment such as a cutter, a breaker, or a fork.
- the quick coupler 1 is connected to the arm 101 via the arm pin 104.
- the quick coupler 1 is connected to the link member 102 via the link pin 105.
- the quick coupler 1 is connected to the attachment 103 via a first pin 106 and a second pin 107.
- FIG. 2 is a perspective view of the quick coupler 1.
- FIG. 3 is an exploded view of the quick coupler 1.
- the quick coupler 1 includes a coupler body 2 and a second hook 3.
- the coupler main body 2 has an arm pin support hole 11 and a link pin support hole 12.
- An arm pin 104 is inserted into the arm pin support hole 11.
- a link pin 105 is inserted into the link pin support hole 12.
- the coupler body 2 has a first hook 4.
- the first hook 4 is locked to the first pin 106.
- the second hook 3 is separate from the coupler body 2.
- the second hook 3 is locked to the second pin 107.
- the direction in which the link pin support hole 12 is located with respect to the arm pin support hole 11 is referred to as the front, and the opposite is referred to as the rear.
- a direction in which the first hook 4 and the second hook 3 are located with respect to the arm pin support hole 11 and the link pin support hole 12 is referred to as a lower side, and the opposite is referred to as an upper side.
- the direction in which the axis of the arm pin support hole 11 and the axis of the link pin support hole 12 extend is referred to as the width direction or the side.
- the terms indicating these directions are specified when the quick coupler 1 is viewed as described above, and do not limit the mounting direction of the quick coupler 1.
- the coupler main body 2 includes a first side surface portion 13, a second side surface portion 14, and a wall portion 15.
- the 1st side part 13 and the 2nd side part 14 have a plate-shaped shape extended in the front-back direction and an up-down direction, respectively.
- the 1st side part 13 and the 2nd side part 14 are arrange
- the wall portion 15 extends in the width direction and is disposed across the first side surface portion 13 and the second side surface portion 14.
- the coupler main body 2 has a first upper side surface portion 16 and a second upper side surface portion 17.
- the first upper side surface portion 16 and the second upper side surface portion 17 have plate-like shapes extending in the front-rear direction and the vertical direction, respectively.
- the first upper side surface portion 16 protrudes upward from the first side surface portion 13.
- the second upper side surface portion 17 protrudes upward from the second side surface portion 14.
- the arm pin support hole 11 and the link pin support hole 12 are provided so as to penetrate the first upper side surface portion 16 and the second upper side surface portion 17 in the width direction.
- FIG. 4 is a side sectional view showing a schematic configuration of the inside of the quick coupler 1.
- the first hook 4 and the second hook 3 are members each having an opening for locking the first pin 106 and the second pin 107 and having a curved recess. It is.
- the first hook 4 and the second hook 3 are opened in opposite directions. Specifically, the first hook 4 is open toward the rear.
- the second hook 3 is open toward the front.
- the second hook 3 is disposed in front of the first hook 4.
- the coupler main body 2 has a pin retaining portion 29.
- the pin retaining portion 29 is disposed to face the opening of the second hook 3.
- the second hook 3 is supported by the coupler body 2 so as to be slidable in the front-rear direction.
- a groove 18 extending in the front-rear direction is provided on the inner side surface of the first side surface portion 13.
- a groove extending in the front-rear direction is similarly provided on the inner side surface of the second side surface portion 14.
- protrusions 19a and 19b extending in the front-rear direction are provided on both side surfaces of the second hook 3.
- the protrusion portion 19 a of the second hook 3 is disposed in the groove 18 of the first side surface portion 13.
- the protruding portion 19 b of the second hook 3 is disposed in the groove of the second side surface portion 14.
- the second hook 3 slides with respect to the coupler main body 2 by the protrusion 19 moving along the groove 18.
- the part 3a connected to the opening of the concave portion of the second hook 3 is parallel to the direction extending in the front-rear direction of the groove 18 in a side view as shown in FIG.
- the quick coupler 1 includes a hydraulic cylinder 5, a first urging member 6, a second urging member 7, and a lock member 8.
- the hydraulic cylinder 5 is connected to the hydraulic system of the work vehicle 100 via the hydraulic pipe 21.
- the hydraulic cylinder 5 expands and contracts by the hydraulic pressure from the hydraulic pipe 21.
- the hydraulic cylinder 5 has a first end 22 and a second end 23.
- the first end 22 is connected to the coupler body 2.
- the second end 23 is connected to the second hook 3.
- the hydraulic cylinder 5 has a cylinder tube 24 and a piston rod 25.
- the first end 22 is included in the cylinder tube 24.
- the second end 23 is included in the piston rod 25.
- the coupler body 2 has a support hole 26.
- the support hole 26 is provided so as to penetrate the first side surface portion 13 and the second side surface portion 14.
- the first end 22 is supported by the coupler body 2 via the first connecting pin 27.
- the first end 22 has a through hole 221 extending in the width direction.
- the first connecting pin 27 is inserted into the first end 22 and the support hole 26.
- the first connecting pin 27 connects the first end 22 of the hydraulic cylinder 5 and the coupler main body 2.
- the support hole 26 is a long hole extending along the expansion / contraction direction of the hydraulic cylinder 5, that is, the front-rear direction. For this reason, the support hole 26 movably supports the first connecting pin 27 in the expansion / contraction direction of the hydraulic cylinder 5.
- the second end 23 is connected to the second hook 3 via the second connecting pin 28.
- the second end portion 23 has a through hole 231 extending in the width direction.
- the front portion of the second hook 3 has a through hole 301 extending in the width direction.
- the second connecting pin 28 is inserted into the through hole 231 of the second end 23 and the through hole 301 of the second hook 3.
- FIG. 5 is a side sectional view showing a state in which the hydraulic cylinder 5 is extended from the state shown in FIG.
- FIG. 6 is a side sectional view showing a state where the hydraulic cylinder 5 is further extended from the state shown in FIG.
- the hydraulic cylinder 5 slides the second hook 3 so that the second hook 3 is separated from the first hook 4.
- FIG. 7 is a side sectional view showing a state in which the hydraulic cylinder 5 is contracted from the state shown in FIG.
- FIG. 8 is a side sectional view showing a state where the hydraulic cylinder 5 is further contracted from the state shown in FIG.
- the hydraulic cylinder 5 contracts, the second end 23 moves so as to approach the first end 22.
- the hydraulic cylinder 5 slides the second hook 3 so as to approach the first hook 4.
- the first urging member 6 shown in FIG. 3 urges the second end 23 so that the second end 23 is separated from the first end 22.
- the first biasing member 6 includes a spring 31, a spring cover 32, and a shaft 33.
- the spring 31 is a coil spring and is disposed in the spring cover 32.
- the end portion 34 of the spring cover 32 is supported by the coupler body 2 via a connecting pin 35.
- the spring 31 in the spring cover 32 is in a compressed state and presses the shaft 33.
- An end portion 36 of the shaft 33 protrudes from the spring cover 32.
- the second hook 3 has a connecting portion 37.
- the connecting portion 37 is provided on the upper surface of the second hook 3.
- the end portion 36 of the shaft 33 is connected to the connecting portion 37 via the connecting pin 40. Since the second urging member 7 has the same configuration as that of the first urging member 6, detailed description thereof is omitted.
- the wall 15 described above is disposed above the hydraulic cylinder 5, the first biasing member 6, and the second biasing member 7. Further, a part of the wall portion 15 is disposed behind the hydraulic cylinder 5 and is disposed to face the first end portion 22 in the expansion and contraction direction of the hydraulic cylinder 5.
- the wall portion 15 has an opening 151.
- the opening 151 is located above the first end 22.
- the hydraulic pipe 21 is introduced into the coupler main body 2 through the opening 151.
- the lock member 8 is disposed above the first hook 4.
- the lock member 8 is connected to the coupler main body 2 via a lock connecting pin 48.
- the coupler main body 2 has a through hole 51.
- the lock member 8 has a through hole 52.
- the lock connection pin 48 is inserted into the through hole 51 of the coupler main body 2 and the through hole 52 of the lock member 8.
- the lock member 8 has a proximal end portion 38 and a distal end portion 39.
- the base end portion 38 is rotatably supported with respect to the coupler main body 2.
- the tip end portion 39 has a hook-like shape bent downward. That is, the tip end portion 39 has a hook-like shape bent toward the first hook 4.
- the lock member 8 is provided so as to be movable between a lock-on position and a lock-off position.
- FIG. 4 shows a state where the lock member 8 is located at the lock-off position.
- FIG. 6 shows a state where the lock member 8 is located at the lock-on position.
- the front end 39 of the lock member 8 projects into the opening of the first hook 4 at the lock-on position.
- the first pin 106 is prevented from coming off from the first hook 4.
- the distal end portion 39 of the lock member 8 is in a state of being retracted from the lock-on position.
- the distal end portion 39 of the lock member 8 is in a state of retreating from the opening of the first hook 4.
- FIG. 6 shows a state in which the first end 22 is located at the holding position.
- the first end 22 holds the lock member 8 in the lock-on position in the holding position.
- the first end 22 moves to the release position by moving closer to the second end 23.
- FIG. 4 shows a state in which the first end 22 is located at the release position. The first end 22 releases the holding of the lock member 8 at the release position.
- the first end portion 22 of the hydraulic cylinder 5 has a convex portion 222 that protrudes toward the lock member 8.
- the convex part 222 protrudes downward.
- the lock member 8 has a concave portion 41 and a receiving portion 42.
- the recessed portion 41 and the receiving portion 42 are located between the base end portion 38 and the distal end portion 39.
- the recess 41 has a shape that is recessed downward from the upper surface of the lock member 8.
- the receiving part 42 is located behind the recessed part 41.
- the convex portion 222 is in contact with the receiving portion 42, and the convex portion 222 attaches the lock member 8 to the first hook 4. It is pushing toward. As a result, the lock member 8 is held in the lock-on position. As shown in FIG. 4, the convex portion 222 is positioned in the concave portion 41 in a state where the first end portion 22 is positioned at the release position. Thereby, the lock member 8 is held in the lock-off position.
- the lock member 8 has an inclined surface 43 and a stepped portion 44 connected to the recess 41.
- the inclined surface 43 and the stepped portion 44 are located between the proximal end portion 38 and the distal end portion 39.
- the inclined surface 43 is disposed in the direction from the second end 23 toward the first end 22 with respect to the recess 41. That is, the inclined surface 43 is disposed behind the recess 41.
- the step portion 44 is arranged in a direction from the first end portion 22 toward the second end portion 23 with respect to the recess portion 41. That is, the stepped portion 44 is disposed in front of the recessed portion 41.
- FIG. 9 is a side view showing the support hole 26 and the elastic member 45. As shown in FIG. 9, the elastic member 45 is disposed in front of the first connecting pin 27 in the support hole 26. That is, the elastic member 45 is disposed so as to be compressed by the first connecting pin 27 as shown in FIG. 10 when the hydraulic cylinder 5 contracts.
- the elastic member 45 is disposed so that the first connecting pin 27 receives resistance due to elastic force when the first end portion 22 moves from the holding position to the release position.
- the support hole 26 is closed from the side by a cover member 46.
- the operation when attaching the attachment 103 to the quick coupler 1 will be described.
- the first pin 106 is locked to the first hook 4 (see arrow A1).
- the second pin 107 is disposed between the second hook 3 and the pin retaining portion 29 (see arrow A2). ).
- the hydraulic cylinder 5 is extended.
- the second end 23 moves forward so as to be separated from the first end 22.
- the second hook 3 slides forward so as to approach the pin retaining portion 29 and is locked to the second pin 107 (see arrow A4).
- the second hook 3 is held in a state where the second hook 3 is locked to the second pin 107. Since the second hook 3 applies pressure to the second pin 107 by the hydraulic cylinder 5, the first connecting pin 27 is firmly held at the rear end in the support hole 26. Therefore, the lock member 8 is firmly held at the lock-on position.
- the attachment 103 is attached to the quick coupler 1.
- the second hook 3 is closest to the pin retaining portion 29 with the attachment 103 attached to the quick coupler 1.
- the width W1 of the gap between the tip of the second hook 3 and the pin retaining portion 29 is narrower than the width W2 of the opening of the second hook 3.
- the width W1 of the gap between the tip of the second hook 3 and the pin retaining portion 29 is narrower than the diameter of the second pin 107.
- the second pin 107 is removed from between the second hook 3 and the pin retaining portion 29 (see arrow A7).
- the first hook 4 is removed from the first pin 106 (see arrow A8).
- the attachment 103 is removed from the quick coupler 1.
- the retaining function by the lock member 8 can be automatically activated when the attachment 103 is mounted. Further, by moving the first end portion 22 of the hydraulic cylinder 5 along the first support hole 26, the retaining function by the lock member 8 can be applied. For this reason, the quick coupler 1 can be reduced in size.
- the width W1 of the gap between the tip of the second hook 3 and the pin retaining portion 29 is the width of the opening of the second hook 3. Narrower than W2. For this reason, even if the first hook 4 is broken, the second pin 107 is prevented from being pulled out from the gap between the tip of the second hook 3 and the pin retaining portion 29. Thereby, the attachment 103 can be prevented from falling off.
- the second end 23 is urged by the first urging member 6 and the second urging member 7 so that the second end 23 is separated from the first end 22. For this reason, even if the extension force of the hydraulic cylinder 5 is lost due to a failure of the hydraulic system or the like, the state in which the second hook is locked to the second pin 107 is the first biasing member 6 and the second biasing member 7. And maintained by. Further, since the state where the first end portion 22 is separated from the second end portion 23 is maintained by the first urging member 6 and the second urging member 7, even if the extension force of the hydraulic cylinder 5 is lost. The lock member 8 is held at the lock-on position. Thereby, the attachment 103 can be prevented from falling off.
- An elastic member 45 is inserted into the support hole 26. For this reason, when the 1st end part 22 moves from a holding position to a release position, the 1st connecting pin 27 receives resistance by elastic force. Thereby, the movement to the cancellation
- the wall portion 15 of the coupler body 2 is disposed to face the first end portion 22 in the expansion / contraction direction of the hydraulic cylinder 5. For this reason, even if the first connecting pin 27 is broken, the hydraulic cylinder 5 remains inside the coupler body 2 by the wall 15. For this reason, the first pin 106 and the second pin 107 are prevented from coming off from the first hook 4 and the second hook 3, respectively. Thereby, the attachment 103 can be prevented from falling off.
- FIG. 11 is a side sectional view showing a schematic configuration of the inside of the quick coupler 10 according to the second embodiment.
- the first urging member 6 and the second urging member 7 of the first embodiment are omitted, and a hydraulic cylinder 61 incorporating the urging member is provided instead. ing.
- the structure of the hydraulic cylinder 61 will be described later.
- a stopper member 94 that prevents the second hook 3 from coming off is attached to the groove 18 of the coupler body 2.
- the stopper member 94 may be omitted.
- parts common to the first embodiment are denoted by the same reference numerals, and detailed description of each part is omitted.
- FIG. 12 is a diagram showing an external appearance of the hydraulic cylinder 61 in the embodiment.
- 13 and 14 are cross-sectional views showing the internal configuration of the hydraulic cylinder 61 of the present embodiment.
- FIG. 13 shows a state where the hydraulic cylinder 61 is contracted
- FIG. 14 shows a state where the hydraulic cylinder 61 is extended.
- the hydraulic cylinder 61 of the present embodiment includes a cylinder tube 62, a piston rod 63, a piston 64, a guide member 65, a first urging member 66, a second urging member 67, and a holding ring 68. I have.
- the piston 64 slides in the cylinder tube 62, and the piston rod 63 connected to the piston 64 expands and contracts.
- the extension direction of the piston rod 63 is indicated by an arrow A
- the direction in which the piston rod 63 is drawn into the cylinder tube 62 is indicated by an arrow B.
- the second end portion 76 of the piston rod 63 forms a connecting portion with a member driven by the hydraulic cylinder 61 as shown in FIG.
- the second end 76 has a through hole 76b.
- the second connecting pin 28 shown in FIG. 11 is inserted into the through hole 76b. Thereby, the 2nd end part 76 is connected with the 2nd hook 3 shown in FIG.
- the piston rod 63 is urged in the extending direction A by the first urging member 66 and the second urging member 67.
- the cylinder tube 62 is a member having a substantially cylindrical shape as shown in FIG. 12, and includes a cylindrical portion 71, a first end portion 72, a lid portion 73, and a support portion 92.
- the cylindrical portion 71 has a cylindrical shape with a space formed inside.
- the longitudinal direction (center axis) of the cylindrical portion 71 coincides with the expansion / contraction direction of the piston rod 63.
- the first end portion 72 is a cylindrical member and is provided so as to close the end of the cylindrical portion 71 on the contraction direction B side.
- the first end portion 72 is joined to the cylindrical portion 71.
- a projecting portion 87 projecting in the extending direction A is formed on the bottom surface 72 a that is the inner surface of the first end portion 72.
- the protrusion 87 is fitted with a guide member 65 described later.
- the lid portion 73 is provided so as to close the end of the cylindrical portion 71 in the extending direction A.
- the lid 73 is a cylindrical member having an insertion hole 88 through which the piston rod 63 is inserted.
- a seal member is provided at the edge of the insertion hole 88 of the lid portion 73 and is sealed so that hydraulic fluid does not leak from between the lid portion 73 and the piston rod 63.
- An insertion portion 89 to be inserted inside the cylinder tube 62 is formed at the end of the lid portion 73 on the contraction direction B side.
- a screw shape is formed on the outer peripheral surface of the insertion portion 89.
- a screw shape is formed inside the end portion 86 of the tubular portion 71 on the extending direction A side.
- a recess 90 is formed on the outer periphery of the insertion portion 89, and an O-ring or the like is inserted into the recess 90 to seal between the tubular portion 71 and the lid portion 73.
- the cylinder tube 62 has a first flow path 74 and a second flow path 75 (not shown in FIG. 12) for supplying or discharging hydraulic oil into the cylinder tube 62.
- the first flow path 74 is formed at the position of the cylindrical portion 71 on the contraction direction B side with respect to the lid portion 73, and opens to the inner peripheral surface 71 a of the cylindrical portion 71.
- the first flow path 74 forms a rod side port of the hydraulic cylinder 61.
- the second flow path 75 is formed at the first end 72 and opens to the bottom surface 72a.
- the second flow path 75 forms a bottom side port of the hydraulic cylinder 61.
- the first flow path 74 is connected to the first hydraulic pipe 95 shown in FIG.
- the second flow path 75 is connected to the second hydraulic pipe 96.
- the first hydraulic pipe 95 and the second hydraulic pipe 96 are connected to the hydraulic pipe 21 described above.
- the support portion 92 is located between the first end portion 72 and the lid portion 73 in the longitudinal direction of the cylinder tube 62. Specifically, the support portion 92 is located between the first end portion 72 and the cylindrical portion 71 in the longitudinal direction of the cylinder tube 62.
- the support part 92 has a convex part 922 corresponding to the convex part 222 of the first embodiment.
- the support portion 92 is provided with a first connection pin 93 corresponding to the first connection pin 27 of the first embodiment.
- the cylinder tube 62 is supported by the coupler main body 2 via the first connecting pin 93.
- the piston rod 63 is inserted into the insertion hole 88 of the lid portion 73 so as to be movable along the longitudinal direction (stretching direction), and the longitudinal direction coincides with the stretching direction.
- the piston rod 63 has a cylindrical tubular portion 77 having openings at both ends, and a second end portion 76 disposed so as to close the opening on the extending direction A side of the tubular portion 77.
- an inner space 78 is formed in the piston rod 63 from the end surface 77b on the contraction direction B side of the cylindrical portion 77 toward the extension direction A.
- the inner space 78 is formed by being surrounded by the inner peripheral surface 77 a of the cylindrical portion 77 and the inner surface 76 a of the second end portion 76 on the contraction direction B side.
- the inner space 78 has an opening 78a (see FIG. 14) on the contraction direction B side.
- a connecting portion that is connected to the member driven by the hydraulic cylinder 61 is formed at the second end portion 76 that is the end on the extending direction A side.
- the piston 64 is an annular member and is fixed to the outer periphery of the piston rod 63.
- the piston 64 is disposed in the vicinity of the end surface 77 b on the contraction direction B side of the piston rod 63.
- the piston 64 slides on the inner peripheral surface 71 a of the cylindrical portion 71 of the cylinder tube 62.
- the space in the cylinder tube 62 is divided by the piston 64 into a first space 69 on the extension direction A side of the piston 64 and a second space 70 on the contraction direction B side of the piston 64.
- a first flow path 74 is connected to the first space 69, and a second flow path 75 is connected to the second space 70.
- the piston rod 63 passes through the piston 64, and in the contracted state shown in FIG. 13, the end surface 77b on the contraction direction B side of the piston rod 63 is in contact with the bottom surface 72a.
- the guide member 65 is a cylindrical member that guides a first urging member 66 and a second urging member 67, which will be described later, and is disposed in the cylinder tube 62 so that the longitudinal direction is along the expansion and contraction direction.
- the guide member 65 is disposed on the radially inner side of the cylindrical portion 77 of the piston rod 63 in the contracted hydraulic cylinder 61 (FIG. 13).
- the guide member 65 has an opening 82 at the end 81 in the contraction direction B, and a protrusion 87 is fitted into the opening 82.
- the protrusion 87 fits into the end 81, whereby the end 81 of the guide member 65 is held at the center of the bottom surface 72a.
- a protrusion 83 is formed over the entire circumference in the radially outward direction.
- An end 85b of the second urging member 67, which will be described later, in the contraction direction B abuts on the protrusion 83.
- the length of the guide member 65 in the expansion / contraction direction is formed so as to overlap with the piston rod 63 even when the piston rod 63 is extended as shown in FIG.
- the first urging member 66 and the second urging member 67 have a coil shape and are arranged side by side along the expansion / contraction direction.
- the first urging member 66 and the second urging member 67 are coil springs.
- the first urging member 66 and the second urging member 67 may be members other than the coil spring.
- the first urging member 66 and the second urging member 67 are arranged so that the central axis is along the expansion / contraction direction.
- the first urging member 66 and the second urging member 67 are inserted into the inner space 78 of the piston rod 63 and are disposed between the outer peripheral surface 65a of the guide member 65 and the inner peripheral surface 77a of the piston rod 63. Yes.
- the first urging member 66 is arranged on the extending direction A side with respect to the second urging member 67.
- a protruding portion 91 that protrudes in the contraction direction B is formed on the inner surface 76a of the second end portion 76 on the contraction direction B side.
- An end 84 a on the extension direction A side of the first urging member 66 is disposed in a ring-shaped gap formed between the protruding portion 91 and the cylindrical portion 77.
- the end 85b of the second urging member 67 on the contraction direction B side is in contact with the protrusion 83.
- the holding ring 68 is a member for holding the guide member 65 substantially at the center of the inner space 78, and is disposed between the outer peripheral surface 65a of the guide member 65 and the inner peripheral surface 77a of the piston rod 63.
- the holding ring 68 is disposed between the end 84 b on the contraction direction B side of the first biasing member 66 and the end 85 a on the extension direction A side of the second biasing member 67, and the ends 84 b and 85 a are the holding ring 68. Abut.
- the holding ring 68 slides on the outer peripheral surface 65a of the guide member 65 and the inner peripheral surface 77a of the piston rod 63 during expansion and contraction.
- the holding ring 68 is disposed at the approximate center in the extending and contracting direction of the guide member 65 in FIG.
- the piston rod 63 is positioned between the outer peripheral surface 65 a of the guide member 65 and the inner peripheral surface 77 a of the piston rod 63 when the piston rod 63 is extended most.
- the guide member 65 is held at the approximate center of the piston rod 63 by the holding ring 68.
- the guide member 65 is held by a holding ring 68, and an end 81 thereof is held at the center of the bottom surface 72 a by a protruding portion 87.
- the guide member 65 is held at two locations and is accurately arranged at the center of the piston rod 63.
- the first urging member 66, the holding ring 68, and the second urging member 67 are arranged in order from the extending direction A side, and the first urging member 66 and the second urging member 67 are pistons.
- the rod 63 is elastically biased toward the extending direction A.
- the first urging member 66, the second urging member 67, and the holding ring 68 are not joined to other members and are loosely fitted to the guide member 65. Further, the guide member 65 is only fitted into the protruding portion 87 of the cylinder tube 62 and is not joined to the first end portion 72.
- the hydraulic cylinder 61 can be easily assembled by the step of fitting the guide member 65 into the protruding portion 87 and the step of screwing and attaching the lid portion 73 to the cylindrical portion 77 while inserting the piston rod 63.
- hydraulic oil is supplied into the first space 69, and a force on the contraction direction B side is applied to the piston 64 by the hydraulic pressure of the hydraulic oil.
- the piston rod 63 is biased in the extending direction A by the first biasing member 66 and the second biasing member 67.
- the piston 64 is pushed in the contraction direction B opposite to the biasing force of the spring by the pressure of the hydraulic oil.
- the piston 64 is moved in the extending direction A by the urging force of the first urging member 66 and the second urging member 67 together with the hydraulic pressure.
- the piston rod 63 and the piston 64 move in the extending direction A until the end surface 64a on the extending direction A side of the piston 64 contacts the end surface 89a on the contracting direction B side of the inserting portion 89 of the lid portion 73.
- the stroke L is the length between the end face 64a and the end face 89a.
- the piston rod 63 is extended by the hydraulic pressure by the hydraulic oil supplied to the second space 70 and the biasing force by the first biasing member 66 and the second biasing member 67. Is held.
- the hydraulic cylinder 61 of the present embodiment can maintain the extended state even when no hydraulic pressure is applied to the second space 70.
- the hydraulic cylinder 61 of the above embodiment includes a cylinder tube 62, a piston rod 63, a piston 64, a first urging member 66, and a second urging member 67 (an example of a spring member).
- the piston rod 63 is inserted into the cylinder tube 62 so that the longitudinal direction is along the expansion / contraction direction (extension direction A and contraction direction B).
- the piston 64 is fixed to the piston rod 63 and slides on the inner peripheral surface 71 a of the cylinder tube 62.
- the first urging member 66 and the second urging member 67 are disposed along the expansion / contraction direction of the piston rod 63 and urge the piston rod 63 in the extending direction A.
- the piston rod 63 has an opening 78 a in the end surface 77 b on the contraction direction B side, and an inner space 78 is formed from the opening 78 a toward the extension direction A.
- the first urging member 66 and the second urging member 67 are inserted into the inner space 78.
- the inner space 78 is formed inside the piston rod 63, and the first urging member 66 and the second urging member 67 are inserted into the space.
- the first urging member 66 and the second urging member 67 contract only until the end surface 77b of the piston rod 63 contacts the bottom surface 72a of the cylinder tube 62. That is, the first urging member 66 and the second urging member 67 do not shrink too much without providing a spring seat or the like.
- the hydraulic cylinder 61 of the above embodiment further includes a columnar guide member 65.
- the first urging member 66 and the second urging member 67 are coiled.
- the guide member 65 is disposed inside the first urging member 66 and the second urging member 67 so that the longitudinal direction is along the expansion / contraction direction.
- An end 81 (an example of one end) of the guide member 65 is held on the bottom surface 72 a of the cylinder tube 62 that faces the end surface 77 b of the piston rod 63.
- the first urging member 66 and the second urging member 67 can be guided in the extending and contracting direction by the guide member 65, the first urging member 66 and the second urging member 67 can be prevented from buckling. Therefore, the length of the piston rod 63 can be increased and the stroke can be further increased.
- the position of the guide member 65 can be held at a predetermined position (for example, the center) in the cylinder tube 62.
- the hydraulic cylinder 61 of the above embodiment has a cylindrical shape on at least the end 81 (an example of one end) side of the guide member 65.
- the cylinder tube 62 has a protruding portion 87 that protrudes in the extending direction A from the bottom surface 72a. By fitting the protrusion 87 inside the cylindrical shape, the end 81 (one end) of the guide member 65 is held on the bottom surface 72a.
- the guide member 65 is held on the bottom surface 72a by simply assembling the guide member 65 into the protruding portion 87, and the end 81 of the guide member 65 is placed at the center of the bottom surface 72a as shown in FIGS. Can hold.
- the first urging member 66 and the second urging member 67 are coiled. In the state where the hydraulic cylinder 61 is extended most, the lengths of the first biasing member 66 and the second biasing member 67 are shorter than the natural length.
- the length of the first urging member 66 and the second urging member 67 is longer than the natural length, so that hydraulic oil is not supplied. However, the extended state is maintained by the first urging member 66 and the second urging member 67.
- the hydraulic cylinder 61 of the above embodiment further includes a holding ring 68 (an example of a ring-shaped member).
- the holding ring 68 is disposed between the outer peripheral surface 65a of the guide member 65 and the inner peripheral surface 77a of the inner space 78, and slides on the outer peripheral surface 65a and the inner peripheral surface 77a.
- Two first urging members 66 and second urging members 67 that are separated with the holding ring 68 in between are arranged.
- the guide member 65 is held not only by the bottom surface 72a but also by the holding ring 68, and the guide member 65 can be held more stably at a predetermined position.
- the guide member 65 can be held at two points simply by fitting the guide member 65 into the protruding portion 87 and fitting the holding ring 68 into the guide member 65, the guide member 65 can be held with high accuracy by simple assembly.
- the guide member 65 has a protrusion 83.
- the protrusion 83 protrudes outward in the radial direction.
- the end 84 a on the extension direction A side of the first biasing member 66 abuts on the inner surface 76 a on the extension direction A side of the inner space 78, and the end 85 b on the contraction direction B side of the second biasing member 67 on the protrusion 83. Abut.
- the piston rod 63 is urged in the extending direction A, and the extended state is maintained by the first urging member 66 and the second urging member 67.
- the end 85b of the second urging member 67 is in contact with the protrusion 83 of the guide member 65, but the protrusion 83 is not provided and may be in contact with the bottom surface 72a.
- the protrusion 83 is formed in the vicinity of the bottom face 72a, it is not restricted to this, The protrusion 83 may be formed in the extending
- the protruding portion 91 is provided on the inner surface 76a of the second end portion 76, and the end 84a of the first biasing member 66 is fitted between the protruding portion 91 and the cylindrical portion 77.
- the portion 91 may not be provided, and the end 84a may simply contact the inner surface 76a.
- first urging member 66 and the second urging member 67 divided by the holding ring 68 are provided, but the first urging member 66 and the second urging member 67 are further divided. It may be.
- the guide member 65 is not joined to the first end portion 72 and the first urging member 66, the second urging member 67, and the holding ring 68 are also joined in order to enable easy assembly. However, they may be joined by welding or the like.
- the holding ring 68 is provided, and the first urging member 66 and the second urging member 67 are provided with the holding ring 68 interposed therebetween.
- the holding ring 68 is not provided and two attachment members are provided. It does not have to be divided into force members.
- 15 and 16 are cross-sectional views showing the configuration of the hydraulic cylinder 161 in which the holding ring 68 is not provided.
- FIG. 15 is a diagram illustrating a state where the hydraulic cylinder 161 is contracted
- FIG. 16 is a diagram illustrating a state where the hydraulic cylinder 161 is expanded. Note that the external appearance of the hydraulic cylinder 161 is the same as that of the hydraulic cylinder 61, and is omitted.
- the guide member 65 of the hydraulic cylinder 161 is formed integrally with the first end 72 of the cylinder tube 62, unlike the guide member 65 of the hydraulic cylinder 61 of the above embodiment. Unlike the first end portion 72 of the hydraulic cylinder 61, the first end portion 72 of the hydraulic cylinder 161 is not formed with the protruding portion 87 so that the columnar guide member 65 protrudes in the extending direction A. Is formed. The length of the guide member 65 in the expansion / contraction direction is formed to overlap the piston rod 63 in the extended state shown in FIG.
- the urging member 166 is disposed between the outer peripheral surface 65 a of the guide member 65 and the inner peripheral surface 77 a of the inner space 78.
- An end 166 a on the extension direction A side of the urging member 166 is disposed between the protruding portion 91 and the cylindrical portion 77, and an end 166 b on the contraction direction B side is a surface inside the first end portion 72.
- the cylinder tube 62 is in contact with the bottom surface 72a.
- the guide member 65 is integrally formed with the first end 72, but the guide member 65 may be fixed to the second end 76 by welding or the like.
- FIG. 17 is a diagram illustrating an external appearance of a hydraulic cylinder 261 provided with no guide member.
- 18 and 19 are cross-sectional views showing the configuration of the hydraulic cylinder 261.
- FIG. 18 is a diagram illustrating a state where the hydraulic cylinder 261 is contracted
- FIG. 19 is a diagram illustrating a state where the hydraulic cylinder 261 is expanded.
- a projecting portion 87 projecting in the extending direction A is formed on the bottom surface 72 a of the cylinder tube 62 which is the inner surface of the first end portion 72.
- one urging member 266 is provided in the same manner as the hydraulic cylinder 161.
- the end 266 a on the extending direction A side of the urging member 266 is fitted between the protruding portion 91 and the cylindrical portion 77. Further, the protruding portion 87 is fitted inside the end 266b of the biasing member 266 on the contraction direction B side. Thus, the protrusion 87 fits inside the end 266b (an example of the first end) of the urging member 266, so that the position of the urging member 266 remains in the cylinder tube even in the extended state as shown in FIG. 62 can be held in the center.
- the cylindrical portion 71 of the cylinder tube 62 is formed shorter than the cylindrical portion 71 of the hydraulic cylinder 161, but the hydraulic cylinder 261 is larger than the hydraulic cylinder 161. It has the advantage of a simple configuration. Even in this case, since it is not necessary to provide a spring seal, a long stroke can be secured for the size of the hydraulic cylinder 261.
- the first biasing member 66 and the second biasing member 67 are disposed in the hydraulic cylinder 61. Therefore, it is possible to prevent the first urging member 66 and the second urging member 67 from coming into contact with the hydraulic pipe 21 during the operation of the quick coupler 10. Further, it is possible to prevent foreign matters such as sand from adhering to the first urging member 66 and the second urging member 67.
- the first connecting pin 93 is provided on the cylinder tube 62 and is disposed between the first end portion 72 and the lid portion 73 in the axial direction of the cylinder tube 62. Therefore, compared with the case where the 1st connection pin 93 is provided in the 1st end part 72 of the cylinder tube 62, the full length of the hydraulic cylinder 61 can be shortened. Thereby, the enlargement of the quick coupler 10 can be suppressed.
- the shape of the support hole 26 is not limited to the long hole and may be changed.
- the support hole 26 may be circular or oval larger than the first connecting pin 27.
- the lock member 8 is not limited to the configuration of the above-described embodiment, and may be changed.
- the recess 41, the inclined surface 43, or the step 44 may not be provided in the lock member 8.
- the lock member 8 may move to a lock-on position and a lock-off position by moving linearly or curvedly instead of rotating.
- the width of the gap between the tip of the second hook 3 and the pin retaining portion 29 is equal to or larger than the width of the opening of the second hook 3. It may be. Alternatively, the tip of the second hook 3 and the pin retaining part 29 may come into contact with each other.
- the biasing member is not limited to a spring, and may be composed of other members that generate a biasing force, such as a fluid such as a gas or a liquid, or an elastic material.
- the number of urging members is not limited to two, but may be more than two or one.
- the elastic member 45 may be omitted.
- the wall 15 of the coupler body 2 may be omitted.
- the structure of the hydraulic cylinder 61 according to the second embodiment may be changed.
- a quick coupler that can automatically function as a retaining member by a lock member when an attachment is attached and can be downsized.
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Abstract
Description
従来、油圧シリンダには、内部にバネが設けられ、作動油が供給されない場合にはバネの力でピストンロッドの位置が所定位置に保持され、作動油が供給されるとバネが圧縮されてピストンロッドが縮む構成のものがある(例えば、特開平05-256307号参照)。
図1は、第1実施形態に係るクイックカプラ1が装着された作業車両100の一部を示す側面図である。作業車両100は、例えば油圧ショベルである。ただし、作業車両100は、油圧ショベルに限らず、他の作業車両であってもよい。
Claims (11)
- 第1のフックを有するカプラ本体と、
前記第1のフックの開口内に突出するロックオン位置と、前記ロックオン位置から退いたロックオフ位置とに移動可能に設けられるロック部材と、
前記カプラ本体に対してスライド可能に設けられる第2のフックと、
前記カプラ本体に接続される第1端部と、前記第2のフックに接続される第2端部とを有し、伸張することによって前記第2のフックを前記第1のフックから離れるようにスライドさせ、収縮することによって前記第2のフックを前記第1のフックに近づくようにスライドさせる油圧シリンダと、
前記油圧シリンダの前記第1端部と前記カプラ本体とを連結する連結ピンと、
を備え、
前記カプラ本体は、前記連結ピンを前記油圧シリンダの伸縮方向に可動的に支持する支持孔を有し、
前記油圧シリンダの前記第1端部は、前記連結ピンの可動範囲内で前記第2端部から離れるように移動することで前記ロック部材を前記ロックオフ位置から前記ロックオン位置に移動させる、
クイックカプラ。 - 前記支持孔は、前記油圧シリンダの伸縮方向に沿って延びる長孔である、
請求項1に記載のクイックカプラ。 - 前記クイックカプラは、第1のピンと第2のピンとを介してアタッチメントを取り付けるためのクイックカプラであって、
前記カプラ本体は、前記第2のフックの開口に対向して配置されるピン抜け止め部をさらに有し、
前記第2のフックが前記第2のピンに係止した状態で、前記第2のフックの先端と前記ピン抜け止め部との間の隙間の幅は、前記第2のピンの径よりも狭い、
請求項1又は2に記載のクイックカプラ。 - 前記第2端部が前記第1端部から離れるように前記第2端部を付勢する付勢部材をさらに備える、
請求項1から3のいずれかに記載のクイックカプラ。 - 前記付勢部材は、前記油圧シリンダ内に配置される、
請求項4に記載のクイックカプラ。 - 前記支持孔に挿入される弾性部材をさらに備える、
請求項1から5のいずれかに記載のクイックカプラ。 - 前記ロック部材は、
前記カプラ本体に対して回転可能に支持される基端部と、
前記ロックオン位置において前記第1のフックの開口内に突出する先端部と、
前記基端部と前記先端部との間に位置する凹部とを有し、
前記油圧シリンダの前記第1端部は、前記ロック部材に向かって突出する凸部を有し、
前記凸部が前記凹部内に位置する状態で、前記ロック部材は前記ロックオフ位置に位置する、
請求項1から6のいずれかに記載のクイックカプラ。 - 前記ロック部材は、前記凹部に接続される傾斜面を有し、
前記傾斜面は、前記凹部に対して前記第2端部から前記第1端部に向かう方向に配置され、
前記凸部が前記凹部から前記傾斜面に移動して前記傾斜面を押圧することにより、前記ロック部材は前記ロックオフ位置から前記ロックオン位置に移動する、
請求項7に記載のクイックカプラ。 - 前記カプラ本体は、前記油圧シリンダの伸縮方向において前記第1端部と対向して配置される壁部を有する、
請求項1から8のいずれかに記載のクイックカプラ。 - 前記油圧シリンダの前記第1端部は、前記連結ピンの可動範囲内で前記第2端部に近づくように移動することで、前記ロック部材を前記ロックオン位置から前記ロックオフ位置に移動させる、
請求項1から9のいずれかに記載のクイックカプラ。 - 前記第2のフックは、突起部を有し、
前記カプラ本体は、前記突起部が配置される溝を有し、
前記突起部が前記溝に沿って移動することで、前記第2のフックが前記カプラ本体に対してスライドし、
前記溝には、前記第2のフックを抜け止めするストッパ部材が取り付けられる、
請求項1から10のいずれかに記載のクイックカプラ。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/123,389 US9903091B2 (en) | 2014-06-26 | 2015-06-23 | Quick coupler |
CN201580010941.6A CN106062283B (zh) | 2014-06-26 | 2015-06-23 | 快速连接器 |
DE112015001153.6T DE112015001153T5 (de) | 2014-06-26 | 2015-06-23 | Schnellkopplungsvorrichtung |
AU2015281831A AU2015281831B2 (en) | 2014-06-26 | 2015-06-23 | Quick coupler |
KR1020167022163A KR101830253B1 (ko) | 2014-06-26 | 2015-06-23 | 퀵 커플러 |
JP2016529602A JP6178509B2 (ja) | 2014-06-26 | 2015-06-23 | クイックカプラ |
AU2017202314A AU2017202314B2 (en) | 2014-06-26 | 2017-04-07 | Hydraulic cylinder and quick coupler therewith |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2014-131345 | 2014-06-26 | ||
JP2014131345 | 2014-06-26 | ||
JP2015052028 | 2015-03-16 | ||
JP2015-052028 | 2015-03-16 |
Publications (1)
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WO2015199081A1 true WO2015199081A1 (ja) | 2015-12-30 |
Family
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PCT/JP2015/068061 WO2015199081A1 (ja) | 2014-06-26 | 2015-06-23 | クイックカプラ |
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US (1) | US9903091B2 (ja) |
JP (2) | JP6178509B2 (ja) |
KR (1) | KR101830253B1 (ja) |
CN (1) | CN106062283B (ja) |
AU (2) | AU2015281831B2 (ja) |
DE (1) | DE112015001153T5 (ja) |
WO (1) | WO2015199081A1 (ja) |
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Also Published As
Publication number | Publication date |
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AU2017202314A1 (en) | 2017-04-27 |
CN106062283B (zh) | 2018-04-17 |
JP6178509B2 (ja) | 2017-08-09 |
KR20160107317A (ko) | 2016-09-13 |
CN106062283A (zh) | 2016-10-26 |
AU2017202314B2 (en) | 2018-07-12 |
JPWO2015199081A1 (ja) | 2017-04-20 |
KR101830253B1 (ko) | 2018-02-20 |
DE112015001153T5 (de) | 2016-12-22 |
AU2015281831A1 (en) | 2016-09-22 |
JP2017198345A (ja) | 2017-11-02 |
AU2015281831B2 (en) | 2017-02-23 |
JP6435023B2 (ja) | 2018-12-05 |
US20170067223A1 (en) | 2017-03-09 |
US9903091B2 (en) | 2018-02-27 |
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