JP2019044448A - Bucket link device with hook and construction machine comprising the same - Google Patents

Abstract

To securely prevent a removal stop part of a hook body from being damaged in a bucket link device with a hook.SOLUTION: In a housing part 12b in which a hook device 20 is housed, a removal stop part 24 is provided on the tapering tip side 23a of a hook and, at a housed position, a holding part 30 for holding a hook body 23 whose root side 23b has a width longer than that of its tip side is provided. At the holding part 30 are provided a first guide member 31 and a second guide member 32 for interposing the hook body 23 therebetween so that the hook body is housed at the housed position. The interval W between the first guide member 31 and a second guide member 32 is made to be wider than the width W1 of the tip side 23a of the hook and be narrower than the width W2 of the root side 23b of the hook so that the hook body 23 is prevented from being inserted from the root side 23b where the removal stop part 24 does not exist and the hook body is permitted to be inserted from the tip side 23a where the removal stop part 24 exists.SELECTED DRAWING: Figure 4B

Description

  The present invention relates to a hooked bucket link device capable of accommodating a hook device and a construction machine provided with the same.

  Conventionally, a hooked bucket having a bucket link main body, one end of which is connected to the bucket cylinder by the first connecting pin between the bucket cylinder and the bucket and the other end connected to the bucket by the second connecting pin. Link devices are known.

  For example, the hooked bucket link device of Patent Document 1 is provided to a hook device having a coupling portion pivotally coupled to a second coupling pin and a hook body attached to the coupling portion, and a bucket link. The hook device has an opening for loading and unloading the hook device on one side, and is provided in a storage space capable of storing the hook device and the storage space, and guides the hook body from both left and right sides when the hook device is loaded and unloaded. Provided so as to be rotatable in a direction intersecting with the in / out direction of the hook device about the first guide member and the second guide member which are provided and the pivoting axis provided in the first guide member. A latch member for preventing the hook device from coming out of the storage space; and a hook body provided between the first guide member and the latch member; In the state which is stored in the latch member to protrude the hook body and a spring for urging in a direction to lock the hook body.

JP, 2016-104929, A

  By the way, the hook body is usually provided with a retaining portion which is closed and retained after the wire is hung. The retaining portion is a very important component to ensure the safety during the suspension operation.

  However, in the conventional hooked bucket link apparatus, it can be fitted into the storage position from the tip end side of the heel portion having the retaining portion or can be fitted from the root side of the heel portion without the retaining portion. There is. Therefore, when fitted from the root side of the buttocks, the hook body is stored with the retaining portion exposed to the opening, and there is a problem that the retaining portion is easily damaged during operation or the like.

  This invention is made in view of this point, The place made as the objective is to prevent reliably the damage of the securing part of a hook main body.

  In order to achieve the above object, in the present invention, the hook body can not be stored in the direction in which the retaining portion is exposed.

Specifically, according to the first aspect of the invention, the bucket link has one end connected to the bucket cylinder by the first connection pin and the other end connected to the bucket by the second connection pin between the bucket cylinder and the bucket. A hooked bucket link device having a main body is targeted,
The hooked bucket link device is
A proximal end pivotally coupled to the second connecting pin and the proximal end are coupled to each other, and a detachment preventing portion is provided on the tapered distal end side of the collar portion, and the root side is wider than the distal end A hook device having a wide hook body,
A storage portion formed in the bucket link main body and in which the hook device is stored;
And a holding unit provided in the storage unit and holding the hook body in the storage position,
The holding unit is
And a first guide member and a second guide member sandwiching the hook body so as to be stored in the storage position,
The hook main body is prevented from being inserted from the root side without the detachment preventing portion to reach the storage position, while being allowed to be inserted from the tip side with the detachment preventing portion to reach the storage position The distance between at least a portion of the first guide member and the second guide member is wider than the width on the tip side of the ridge within the range where the ridge passes through, and the width on the root side of the ridge It is getting narrower.

  According to the above configuration, when it is attempted to insert the hook body from the root side which is wider than the distal end side without the locking portion, the first part is formed in at least a part of at least a part of the range through which the hook passes. Since the distance between the guide member and the second guide member is wider than the width on the tip side of the buttocks and narrower than the width on the root side of the buttocks, the buttocks will not pass. For this reason, the hook body can not be stored in the direction in which the retaining portion is exposed. On the other hand, when the hook body is inserted from the distal end side with the detachment preventing portion, the buttocks pass through the accommodation position and are accommodated. Here, “the distance between at least a part of the first guide member and the second guide member” means that the distance between the first guide member and the second guide member is “the width of the tip side of the buttocks in all the regions”. "It is not necessary to be wider than the width of the root side of the buttocks", and it is not necessary for the root side of the buttocks to pass before it reaches the storage position. It means that "narrower than the width of the side" is good.

A second invention is directed to the hooked bucket link apparatus,
The hooked bucket link device is
A proximal end pivotally coupled to the second connecting pin and the proximal end are coupled to each other, and a detachment preventing portion is provided on the tapered distal end side of the collar portion, and the root side is wider than the distal end A hook device having a wide hook body,
A storage portion formed in the bucket link main body and in which the hook device is stored;
And a holding unit provided in the storage unit and holding the hook body in the storage position,
The holding unit is
A first guide member and a second guide member sandwiching the hook body so as to be stored in the storage position;
A lock position for holding the hook main body in the storage position and a lock member pivotally supported between the first guide member and an open position capable of being released from the lock position;
And a biasing member for biasing the locking member in the direction in which the hook body holds the locking member in the storage position.
The hook body is prevented from passing to the lock position when the hook body is inserted from the root side without the detachment preventing portion while pressing the lock member against the biasing force of the biasing member. The distance between at least a portion of the first guide member and the second guide member is wider than the width at the tip end of the ridge and smaller than the width at the root of the ridge.

  According to the above configuration, the first guide member and the first guide member are inserted if it is attempted to insert the hook body from the root side which has no locking portion and is wider than the tip end side while pressing the lock member against the biasing force of the biasing member. Since the distance between the second guide members is wider than the width on the tip end side of the buttocks and narrower than the width on the root side of the buttocks, the buttocks do not pass to the lock position. For this reason, the hook body can not be stored in the direction in which the retaining portion is exposed. On the other hand, when the hook body is inserted from the tip end side with the detachment preventing portion while pressing the locking member against the biasing force of the biasing member, the hook portion passes to the locking position and is stored in the storage position. Here, “the distance between at least a part of the first guide member and the second guide member” means that the distance between the first guide member and the second guide member is “the width of the tip side of the buttocks in all the regions”. "It is not necessary to be wider than the width of the root side of the buttocks", and it is not necessary for the root side of the buttocks to pass before reaching the lock position. It means that "narrower than the width of the side" is good.

In the third invention, in the second invention,
The distance between the first guide member and the second guide member is gradually narrowed toward the lock position when the second connection pin is viewed from the first connection pin.

  According to the above configuration, the hook main body is prevented from being stored in the direction in which the retaining portion is exposed, without weakening the function of guiding the hook main bodies of the first guide member and the second guide member to the storage position.

  In the construction machine of the fourth invention, the hooked bucket link device of any one of the first to third inventions is provided between the bucket cylinder and the bucket.

  According to the above configuration, it is possible to obtain a highly commercial construction machine equipped with a hooked bucket link device in which damage to the retaining portion is reliably prevented.

  As described above, according to the present invention, the distance between the first guide member and the second guide member is wider than the width on the tip end side of the buttocks and narrower than the width on the root side of the buttocks Since the passage to the storage position is blocked when inserted from the root side without a stop, damage to the hook body's retaining portion can be reliably prevented.

It is a perspective view which shows the bucket link apparatus with a hook in which the hook main body is in a storage position. It is a perspective view which expands and shows a holding | maintenance part. It is a perspective view which expands and shows the storage part in which the hook main body is in a storage position, and a hook apparatus. It is a side view which shows the hook apparatus and holding part in a storing position. It is the arrow line view seen from the VIB direction of FIG. 4A. It is a VIC-VIC line sectional view of Drawing 4A. It is a VID-VID line sectional view of Drawing 4A. It is the FIG. 4A equivalent view which shows a mode that it is going to insert in a reverse direction. It is a VB-VB line sectional view of Drawing 4A. It is the VC-VC sectional view taken on the line of FIG. 4A. It is a side view showing a hydraulic shovel equipped with a bucket link device with a hook. It is the FIG. 5C phase etc. figure which shows the 1st guide member which concerns on the modification 1 of embodiment of this invention, and a 2nd guide member. It is the FIG. 5C phase etc. figure which shows the 1st guide member which concerns on the modification 2 of embodiment of this invention, and a 2nd guide member. It is the FIG. 5C phase etc. figure which shows the 1st guide member which concerns on the modification 3 of embodiment of this invention, and a 2nd guide member.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

  FIG. 6 shows a hydraulic shovel 1 as a construction machine provided with a hooked bucket link apparatus according to an embodiment of the present invention. The hydraulic shovel 1 includes, for example, a lower traveling body 2 such as a crawler, an upper swing body 3 rotatably supported by the lower travel body 2, a cab 4 provided in the upper swing body 3, and an upper portion And a lower boom 5 supported on the revolving unit 3 so as to be able to move up and down. The lower boom 5 is supported so as to be able to move up and down by an up and down cylinder 6, and an arm 7 is supported so as to be able to swing by an arm cylinder 8 at its tip. At the tip of the arm 7, a bucket 9 is swingably supported by a bucket cylinder 10 via an arm link 11 and a hooked bucket link apparatus 12. The lower traveling body 2 may be a wheel.

  Specifically, the hooked bucket link device 12 is connected to the bucket cylinder 10 by the first connection pin 13 at one end between the bucket cylinder 10 and the bucket 9 and is connected to the bucket 9 at the other end. 14 are connected and attached.

  And as shown in FIG. 1, the bucket link apparatus 12 with a hook is provided with the hook apparatus 20, and this hook apparatus 20 is proximal end 21 and proximal end which are connected with the 2nd connection pin 14 so that rocking is possible. 21 has a hook body 23 connected to it. The hook body 23 has a ridge portion having a substantially circular or elliptical cross section, the width of the root side 23b is wide, and the tip end side 23a bent in an arc shape is thin. In the gap between the end side 23a and the root side 23b through which a wire or the like passes, a retaining portion 24 biased in the closing direction is provided. The retaining portion 24 has, for example, a bent structure of a steel plate. The hook portion of the hook main body 23 is pivotable about a hook support pin 25 provided at the base end portion 21. Further, the hook portion of the hook body 23 is rotatably supported with respect to the proximal end portion 21.

  Further, the bucket link main body 12a, which is a member excluding the hook device 20, is provided with a storage portion 12b in which the hook device 20 is stored. The storage portion 12b is provided in a space between the first boss 12c and the second boss 12d in the bucket link main body 12a and surrounded by the pair of side plates 12e and the bottom plate 12f. A top plate is not provided on the side opposite to the bottom plate 12f, and an opening through which the hook body 23 enters and exits is formed. Note that one side plate 12e is omitted in FIG. 1 for the sake of clarity.

  The storage portion 12 b is provided with a holding portion 30 for holding the hook body 23 at the storage position. As shown in an enlarged manner in FIG. 2, the holding portion 30 includes, for example, a plate-like base portion 30 a, which can be fixed to the bottom plate 12 f by a bolt 30 b, and accommodates the hook body 23. For example, the first guide member 31 and the second guide member 32 which sandwich the sheet so as to be stored in the position are fixed by welding.

  A lock member 35 is swingably supported by a lock member swing shaft 34 provided on the first guide member 31. Specifically, the lock member swings the lock member 35 supported between the first guide member 31 and the swing shaft support portion 33 closer to the second connecting pin 14 than the first guide member 31. It is swingably supported about a shaft 34. The lock member 35 is swingably supported between a lock position for holding the hook body 23 in the storage position and an open position for releasing the lock body from the lock position. The lock member swing shaft 34 is configured, for example, by fastening a double nut 34 b to a rod bolt 34 a. The lock member swinging shaft 34 may be formed of, for example, a pin other than the rod bolt 34a.

  As shown in FIGS. 2 and 3, the lock member 35 urges the lock operating portion 35a for releasing the lock member 35 by operating the lock member 35 and the lock member 35 in the direction in which the hook body 23 is held at the storage position. And a biasing member 36. The lock operation portion 35 a is in the form of a protrusion extending from the upper side of the lock member 35. The lock member 35 has a pressing portion 35 b that abuts on the hook portion of the hook body 23. The biasing member 36 is, for example, a torsion spring, but is not particularly limited. The lock member 35 may be formed by cutting a steel plate or may be formed by casting. The biasing member 36 biases the lock member 35 so that the pressing portion 35b returns to the original position when the hook body 23 pushes through the pressing portion 35b and passes through the pressing portion 35b.

  Further, a stopper pin 37 is also provided between the first guide member 31 and the swinging shaft support portion 33. The stopper pin 37 is engaged with one end of the biasing member 36 and is a lock member. It plays a role in regulating the swing range of 35.

  As shown to FIG. 4B and FIG. 5C, the space | interval W between the 1st guide member 31 and the 2nd guide member 32 is wider than the front end side 23a of the collar part of the hook main body 23, and is more than the root side 23b of a collar part. Is also narrow. The position at which the distance W is defined may be a position at a height from the bottom plate 12f which can prevent the root side 23b of the buttock from passing through to reach the storage position when viewed in the vertical direction N. . For example, in the case where the cross section of the buttocks has a bulging portion that is partially bulging, the distance at which the bulging portion can pass in the first guide member 31 and the second guide member 32 in FIG. It is sufficient to set such that any part of the root side 23b of the buttocks can not pass through the gap W at the front side of FIG. By doing so, it is possible to prevent the hook main body 23 from being inserted from the root side 24 b without the locking portion 24 and reaching the locking position of the locking member 35.

  And when the space | interval of the 1st guide member 31 and the 2nd guide member 32 sees the 2nd connection pin 14 from the 1st connection pin 13, it is narrowed gradually so that it may mutually approach toward the bottom plate 12f. Note that, as will be described later as a modified example, the way of providing this interval is not particularly limited.

  Next, the storage procedure of the hook device 20 in the hooked bucket link device 12 according to the present embodiment will be described.

  First, as shown in FIGS. 4A to 4D, when the hook body 23 is to be stored in the storage portion 12b from the retaining portion 24 side (the tip side 23a), the width W1 of the tip side 23a of the buttocks is the root side 23b. Since the width is smaller than the width W2, the tip end side 23a does not allow the width W between the first guide member 31 and the second guide member 32 while pressing the lock member 35 against the biasing force of the biasing member 36. After passing through the pressing portion 35b of the lock member 35, the lock member 35 is returned to the original position by the biasing force of the biasing member 36, and the hook main body 23 is reliably held at the storage position.

  At this time, as also shown in FIG. 1, the hook body 23 of the hook device 20 is stored in the storage portion 12b of the bucket link main body 12a with the retaining portion 24 on the bottom plate 12f side. Hard to hit and hard to damage.

  Conversely, as shown in FIGS. 5A to 5C, if it is intended to store the hook body 23 from the root side 23b instead of the retaining portion 24, the width W2 of the root side 23b of the buttocks is greater than the width W1 of the tip side 23a. Because it is also wide, as shown in FIG. 5C, it is caught between the first guide member 31 and the second guide member 32, and can not pass through the lock member 35 as shown in FIG. 5B, and is held in the storage position Can not do it. For this reason, the worker notices that he is trying to attach in the opposite direction, and can urge the user to store the hook body 23 again with the retaining portion 24 on the bottom plate 12f side.

  Therefore, according to the hooked bucket link device 12 according to the present embodiment, it is possible to prevent the storage of the hook main body 23 in the direction in which the retaining portion 24 is exposed, and to reliably prevent the retaining portion 24 from being damaged.

  Further, since the hydraulic shovel 1 is provided with the hooked bucket link device 12 described above between the bucket cylinder 10 and the bucket 9, the hooked bucket link device 12 can be reliably prevented from being damaged by the retaining portion 24. A highly marketable hydraulic excavator 1 is obtained.

-Modification 1-
FIG. 7A shows a modification 1 of the embodiment of the present invention, which is different from the above embodiment in that the shapes of the first guide member 31 ′ and the second guide member 32 ′ are different. In the following modifications, the same parts as those in FIGS. 1 to 6 are denoted by the same reference numerals, and the detailed description thereof is omitted.

  In this modification, passage between the root side 23b of the buttocks is prevented, and a portion between the first guide member 31 'and the second guide member 32' is extended to a portion of a width W which allows passage of the tip side 23a of the buttocks. The intervals are inclined so as to narrow each other, and thereafter become linear along the vertical direction N toward the bottom plate 12 f. Also in this case, storage from the tip end side 23 a of the hook main body 23 is permitted as in the above embodiment, and storage from the root side 23 b can be prevented.

-Modification 2-
FIG. 7B shows a modification 1 of the embodiment of the present invention, which is different from the above embodiment in that the shapes of the first guide member 31 '' and the second guide member 32 '' are different.

  In this modification, the first guide member 31 ′ ′ and the second guide member 32 ′ ′ are not provided on the bottom plate 12 f side, but are provided so as to extend horizontally to the pair of side plates 12 e. Also in this case, it is sufficient to prevent the passage of at least the root side 23b of the buttocks and provide a gap having a width W which allows the passage of the fore end side 23a of the buttocks. Also in this case, storage from the tip end side 23 a of the hook main body 23 is permitted as in the above embodiment, and storage from the root side 23 b can be prevented.

-Modification 3-
FIG. 7C shows a modification 1 of the embodiment of the present invention, which is different from the above embodiment in that the shapes of the first guide member 31 ′ ′ ′ and the second guide member 32 ′ ′ ′ are different.

  In this modification, although it has the shape similar to the 1st guide member 31 of the said embodiment, and the 2nd guide member 32, the bottom plate 12f side is connected integrally. When inserted from the retaining portion 24 side, the integrally connected portion may protrude to such an extent that it does not abut on the retaining portion 24. Thereby, the strength on the proximal end side of the first guide member 31 ′ ′ ′ and the second guide member 32 ′ ′ ′ can be secured. Also in this case, storage from the tip end side 23 a of the hook main body 23 is permitted as in the above embodiment, and storage from the root side 23 b can be prevented.

(Other embodiments)
The present invention may be configured as follows for the above embodiment.

  That is, in the above embodiment, the lock member 35 is provided to prevent the hook main body 23 from coming off from the storage position, but for example, in the storage position, the retaining pin is passed from one side plate 12e through the hook portion of the hook main body 23 It may be inserted into the other side plate 12e to prevent it from coming off. Also in this case, the position at which the retaining pin is inserted corresponds to the lock position, and when attempting to store from the root side 23b of the buttocks, the first guide for preventing the root side 23b of the buttocks from passing The width W between the member 31 and the second guide member 32 may be set.

  For example, although the example of the hydraulic shovel 1 was shown as a construction machine, it may be a backhoe loader etc. which have an attachment which has the bucket link apparatus 12 with a hook on the opposite side of a dozer.

  The above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and uses.

1 Hydraulic excavator (construction machine)
2 Lower body
3 upper swing body
4 cab
5 lower boom
6 relief cylinder
7 arms
8-arm cylinder
9 bucket
10 bucket cylinders
11 arm link
12 bucket link device with hook
12a Bucket link body
12b storage section
12c 1st boss
12d second boss
12e side plate
12f bottom plate
13 1st connecting pin
14 2nd connecting pin
20 hook device
21 base end
23 Hook body
23a Tip side of buttocks
23b Root side of buttocks
24 Retaining part
25 buttock support pin
30 Holder
30a base
30b bolt
31, 31 ', 31'',31''' first guide member
32, 32 ', 32'',32''' second guide member
34 Locking member rocking shaft
34a Rod bolt
34b double nut
35 Locking member
35a Lock control unit
35b pressing part
36 biasing member
37 Stopper pin

Claims (4)

A hooked bucket link device having a bucket link body having one end connected to the bucket cylinder by the first connecting pin and the other end connected to the bucket by the second connecting pin between the bucket cylinder and the bucket, ,
A proximal end pivotally coupled to the second connecting pin and the proximal end are coupled to each other, and a detachment preventing portion is provided on the tapered distal end side of the collar portion, and the root side is wider than the distal end A hook device having a wide hook body,
A storage portion formed in the bucket link main body and in which the hook device is stored;
And a holding unit provided in the storage unit and holding the hook body in the storage position,
The holding unit is
And a first guide member and a second guide member sandwiching the hook body so as to be stored in the storage position,
The hook main body is prevented from being inserted from the root side without the detachment preventing portion to reach the storage position, while being allowed to be inserted from the tip side with the detachment preventing portion to reach the storage position The distance between at least a portion of the first guide member and the second guide member is wider than the width on the tip side of the ridge within the range where the ridge passes through, and the width on the root side of the ridge A hooked bucket link device characterized in that it is narrowed. A hooked bucket link device having a bucket link body having one end connected to the bucket cylinder by the first connecting pin and the other end connected to the bucket by the second connecting pin between the bucket cylinder and the bucket, ,
A proximal end pivotally coupled to the second connecting pin and the proximal end are coupled to each other, and a detachment preventing portion is provided on the tapered distal end side of the collar portion, and the root side is wider than the distal end A hook device having a wide hook body,
A storage portion formed in the bucket link main body and in which the hook device is stored;
And a holding unit provided in the storage unit and holding the hook body in the storage position,
The holding unit is
A first guide member and a second guide member sandwiching the hook body so as to be stored in the storage position;
A lock position for holding the hook main body in the storage position and a lock member pivotally supported between the first guide member and an open position capable of being released from the lock position;
And a biasing member for biasing the locking member in the direction in which the hook body holds the locking member in the storage position.
The hook body is prevented from passing to the lock position when the hook body is inserted from the root side without the detachment preventing portion while pressing the lock member against the biasing force of the biasing member. The hooked bucket characterized in that an interval between at least a part of the first guide member and the second guide member is wider than the width at the tip end of the ridge and smaller than the width at the root of the ridge. Link device. In the hooked bucket link device according to claim 2,
The distance between the first guide member and the second guide member is gradually narrowed toward the lock position when the second connection pin is viewed from the first connection pin. Bucket link device. A construction machine in which the hooked bucket link device according to any one of claims 1 to 3 is provided between a bucket cylinder and a bucket.