JPH0729044U - Hydraulic excavator adapter - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an adapter for a hydraulic excavator that enables use of a bucket even if there is a difference in the distance between two pins inserted in the upper portion of the bucket or the pin diameter dimension. [Structure] A pair of connecting plates 1a, 1 constituting the adapter 1
b, a fixed connecting member 4 provided on the connecting plate, a support shaft 5 supported on the connecting plate, a movable connecting member 7 provided on an arm member projecting from the support shaft, a fixed connecting member and a movable connecting member. The pin engaging grooves 8a and 8b provided in a direction, the connecting cylinder 9 interposed between the connecting plate and the arm member, the engaging tooth row 10 formed on the arm member base, and the engaging tooth row. A hydraulic excavator provided with an operating member 11 having a protruding piece 12 to be fitted, a spring 14 for biasing the operating member, and a securing pin mechanism 15 for holding the operating member at a position where the protruding piece is disengaged from the engaging tooth row. Is an adapter for.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an adapter for a hydraulic excavator used for attaching a bucket that is an attachment to the tip of an arm pivotally attached to a hoisting boom of a hydraulic excavator and a rod tip member of a bucket rotating cylinder.

[0002]

[Prior art]

 Hydraulic excavators used as work machines in civil engineering and construction sites have a swivel mounted on the vehicle body, a hoisting boom pivotally attached to the swivel, and an arm and bucket cylinder for pivoting at the tip of the hoisting boom. Then, a bucket (attachment) is detachably attached to the arm tip and the rod tip member of the bucket rotating cylinder for use in the work. In this case, when attaching the bucket to the arm tip and the rod tip member, generally, two pins are coupled to a bracket provided on the upper portion of the bucket.

[0003]

[Problems to be solved by the device]

 However, not only for buckets, but for attachments for attachments used in hydraulic excavators, for example, the configuration dimensions of the brackets on the bucket top and the pin holes on the brackets are unique to the manufacturer. Since no standardization has been made, the dimensions of the mounting part differ depending on the manufacturer, and it is usually not compatible with other meters.

The present invention has been made in view of the above point, and when the bucket is attached to the arm tip and the rod tip member of the bucket rotating cylinder, the pin interval between the two pins on the bucket side or the pin diameter is adjusted. It is an object of the present invention to provide an adapter for a hydraulic excavator, which enables mounting even if there are some differences, and which is surely locked and convenient to handle.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the gist of the present invention is that a hoisting boom is pivotally attached to a swivel on the vehicle body, and the arm tip pivotally attached to the tip of the hoisting boom and the rod tip member of the bucket rotating cylinder. An adapter for attaching the bucket to the, and a pair of connecting plates configured so that the lower part can be inserted between brackets provided parallel to the upper part of the bucket, and the connecting plate provided on the upper part of the connecting plate. A pin hole for pin-connecting to the arm tip and the rod tip member, a fixed connecting member provided at the lower part of the connecting plate corresponding to one pin hole of the pin hole, and supported by the connecting plate near the other pin hole. A support shaft, an arm member projecting from the support shaft so as to be swingable, a movable connecting member provided on the arm member, and a sideways opening in the fixed connecting member and the movable connecting member in a backward direction. Pin engaging groove, the connecting plate and the arm member A connecting cylinder, an engaging tooth row formed on the base of the arm member, and a projecting piece pivotally attached to the connecting plate corresponding to the engaging tooth row and engaging with the engaging tooth row. An operating member having a lever, a spring that is interposed between the operating member and the connecting plate, and urges the protruding piece in the engaging direction with respect to the engaging tooth row, and is provided on the connecting plate corresponding to the operating member. The hydraulic excavator adapter is provided with a securing pin mechanism that holds the operating member at a position where the projecting piece is disengaged from the engaging tooth row.

[0006]

[Action]

 The adapter is pin-attached to the arm tip of a size suitable for this and the rod tip member of the bucket rotating cylinder. To attach the bucket to the adapter, fix the operation cylinder by fixing the operating member by moving the connecting cylinder down and inserting the lower part of the connecting plate between the two pins on the bucket side. After inserting one pin into the pin engaging groove of the connecting member, while extending the connecting cylinder, insert the other pin into the pin engaging groove of the movable connecting member, and insert the two pins on the bucket side. Hold it in a bracing condition between the two. When the locking of the operating member by the locking pin mechanism is released, the projecting piece of the operating member is pressed against the engaging tooth row under the bias of the spring and locked.

[0007]

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are front views in which a part of the adapter of the present invention is cut away, FIG. 3 is a plan view, and FIG. 4 is a side view showing a usage mode of the adapter of the present invention.

In the figure, reference numeral 1 indicates the entire adapter. The adapter 1 has a pair of connecting plates 1a and 1b, pin holes 2a and 2b are provided above the connecting plates 1a and 1b, and the arm tip A and the rod tip member B of the bucket rotating cylinder are connected to both connecting plates. It is inserted between 1a and 1b and is connected by using pins 3a and 3b.

Reference numeral 4 denotes a fixed connecting member provided below the connecting plates 1a and 1b corresponding to one pin hole 2a of the connecting plates 1a and 1b, and 5 supports the connecting plates 1a and 1b near the other pin hole 2b. A support shaft, 6 is an arm member projecting from the support shaft 5 so as to be swingable, and 7 is a movable connecting member provided on the arm member 6. The fixed connecting member 4 and the movable connecting member 7 are arranged backwards. The pin fitting grooves 8a and 8b which are opened laterally are provided.

Reference numeral 9 denotes a connecting cylinder that is interposed between the connecting plates 1 a and 1 b and the arm member 6. The cylinder base is pivotally attached to the connecting plate side, and the rod tip member 9 a is connected to the middle portion of the arm member 6. The movable connecting member 7 is swung by the expansion and contraction of the movable connecting member 7 to make the distance between the movable connecting member 7 and the fixed connecting member 4 variable.

Reference numeral 10 denotes an engaging tooth row formed in the base portion of the arm member 6 and is composed of a plurality of saw tooth-shaped teeth. Reference numeral 11 denotes an operation member pivotally attached to the connecting plates 1a and 1b corresponding to the engagement tooth row 10, and has a protrusion 12 and an operation lever 13 that engage with the engagement tooth row 10.

A spring 14 is interposed between the operating member 11 and the connecting plate 1 a, and biases the projection 12 of the operating member 11 against the engaging tooth row 10 in the engaging direction. Reference numeral 15 denotes a securing pin mechanism provided on the connecting plate 1a corresponding to the operating member 11. The securing pin mechanism 15 penetrates the connecting plate 1a and the inside of the connecting plate 1a as shown in FIGS. The locking pin 17 that moves in and out of the operation member 11 and is inserted into the pin hole 16 provided in the operating member 11, the spring 18 that biases the locking pin 17 in the protruding direction, and the locking pin 17 that is integrally provided with the connecting plate. A finger hook portion 19 for operating the fastening pin 17 is provided on the outer side of the la 1a for fastening the operating member 11 to a position where the protrusion 12 is disengaged from the engaging tooth row 10 and is in a normal state. Then, the binding pin 17 is projected to the inside of the connecting plate 1a under the bias of the spring 18.

The protruding piece 12 of the operation member 11 released from the locking by the locking pin mechanism 15 is pressed against the engaging tooth row 10 under the bias of the spring 14, Since the teeth forming the tooth are formed in a sawtooth shape, the connecting cylinder 9 extends and moves like a one-way clutch to increase the distance between the fixed connecting member 4 and the movable connecting member 7, and this is not possible. I'm trying to forgive.

In the above structure, the adapter 1 is attached to the arm tip A and the rod tip member B of the bucket rotating cylinder. The pins 3a and 3b used here are adapted to the pin holes 2a and 2b provided in the connecting plates 1a and 1b and the pin holes (not shown) provided in the arm tip A and the rod tip member B of the bucket rotating cylinder. It is a thing. The pins 3a and 3b may be the pins that have been used to attach the bucket C until then.

On the other hand, in the pin hole of the bracket 20 provided on the upper part of the bucket C, two pins 21a and 21b suitable for this are separately prepared and inserted in advance.

In order to mount the bucket C on the adapter 1, first, the entire adapter 1 is moved to insert the lower part of the connecting plates 1a and 1b between the two pins 21a and 21b on the bucket C side. In this way, one pin 21 a is inserted into the pin engaging groove 8 a of the fixed connecting member 4. While the connecting cylinder 9 is continuously extended, the other pin 21b is inserted into the pin engaging groove 8b of the movable connecting member 7. Here, the fixed connecting member 4 and the movable connecting member 7 are held in a tensioned state with respect to the two pins 21a and 21b on the bucket C side, and the projecting piece 12 of the operating member 11 is biased by the spring 14. The engagement tooth row 10 is pressed and engaged. The engagement position of the protrusion 12 with respect to the engagement tooth row 10 does not necessarily have to reach the root of the tooth forming the engagement tooth row 10. Even when the protruding piece 12 is pressed against the intermediate portion of one tooth forming the engaging tooth row 10, the connecting cylinder 9 is inadvertently contracted and the bucket C is disengaged. Then, under the urging force of the ridge 14, the protrusion 12 reaches the root of the engaging tooth row 10 in the immediate vicinity and locks, and prevents the movement thereafter.

Next, when removing the bucket C from the adapter 1, the operating lever 13 of the operating member 11 is operated to separate the protruding piece 12 from the engaging tooth row 10, and the securing pin mechanism 15 is operated. , The locking pin 17 protruding inside the connecting plate 1a is once retracted and then inserted into the pin hole 16 of the operating member 11 to fix the operating member 11.

In this way, with the lock released, the connecting cylinder 9 is contracted and the two pins 21a and 21b of the bucket C are moved in the reverse order to the pin holes 8a of the fixed connecting member 4 and the movable connecting member 7. , 8b.

[0020]

[Effect of device]

 According to this invention configured as described above, the following effects can be obtained.

(1) Since the manual work is not required unlike the conventional bucket mounting work in which the bucket is directly pin-engaged with the arm tip and the rod tip member of the bucket rotating cylinder, the bucket attaching / detaching work is performed. Is done very efficiently.

(2) A fixed connecting member and a movable connecting member are inserted between two pins on the bucket side, and these two pins are inserted into pin engaging grooves provided on both members in a back direction and are stretched. Since the mounting is carried out in a fixed shape, it is possible to securely mount even buckets with different pin spacings and pin diameters, etc. on the bucket side. Allows the use of similar attachments, is compatible and improves workability.

(3) After attaching the bucket to the adapter, the protrusion of the securing pin mechanism engages with the engaging tooth row to prevent the movement when the bucket is removed. The bucket will not accidentally come off during work.

[Brief description of drawings]

FIG. 1 is a front view in which a part of the adapter of the present invention is cut away.

FIG. 2 is a front view in which a part of the adapter of the present invention is cut away.

FIG. 3 is a side view showing a mode of use of the adapter of the present invention.

FIG. 4 is a plan view of the adapter of the present invention.

FIG. 5 is a partial cross-sectional view of a main part in a state where the operation member is fixed by the fixing pin mechanism.

FIG. 6 is a partial cross-sectional view of a main part in a state where an operation member is opened by a securing pin mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Adapter 1a ... Connection plate 1b ... Connection plate 4 ... Fixed connection member 5 ... Spindle 7 ... Movable connection member 8a ... Pin engagement groove 8b ... Pin engagement groove 9 ... Connection cylinder 10 ... Engagement tooth row 11 ... Operating member 12 ... Projection piece 14 ... Spring 15 ... Locking pin mechanism

Claims (1)

[Scope of utility model registration request] 1. A hoisting boom is pivotally attached to a swivel on a vehicle body,
An adapter for attaching a bucket to an arm tip pivotally attached to the tip of the hoisting boom and a rod tip member of a bucket rotation cylinder, and a lower part can be inserted between brackets provided in parallel to the upper part of the bucket. A pair of connecting plates, a pin hole provided on the upper part of the connecting plate for pin-connecting to the arm tip and the rod tip member, and at the lower part of the connecting plate corresponding to one of the pin holes. The fixed connecting member provided, the support shaft supported by the connecting plate in the vicinity of the other pin hole, the arm member projecting swingably from the support shaft, the movable connecting member provided on the arm member, and the fixed member. A pin engaging groove provided in the connecting member and the movable connecting member by opening them laterally in a back direction;
A connecting cylinder interposed between the connecting plate and the arm member, an engaging tooth row formed on the base of the arm member, and pivotally attached to the connecting plate corresponding to the engaging tooth row, Corresponding to the operating member, an operating member having an engaging projection and an operating lever, a spring interposed between the operating member and the connecting plate, and urging the protruding member in the engaging direction with respect to the engaging tooth row. The hydraulic excavator adapter is provided with a locking pin mechanism which is provided on the connecting plate and holds the operating member at a position where the projecting piece is disengaged from the engaging tooth row.