KR100956998B1 - a bucket mounting structure for using arm attachments in heavy construction equipment - Google Patents

Abstract

A bucket fixing structure for a construction machine for fixing a bucket having a mounting flange to an arm hinge portion by a hinge pin, wherein a bushing hole is formed in the mounting flange, and a flange support portion and the flange support portion are inserted into the bushing hole. A bushing having a cover support extending from the bushing, the bushing being pinned outside the arm hinge portion to be adjacent to the inner wall of the mounting flange; A ground part spaced apart from the outer wall of the mounting flange by an interview with the cover support part and a plurality of fastening parts radially spaced apart from the ground part by a hinge pin, and fixed to the outside of the mounting flange by the hinge pin. Flange fixing cover; And a hinge pin pin-coupled to the arm hinge portion, the hinge pin configured to rotatably fix the bushing, the mounting flange, and the flange fixing cover to the arm hinge portion. In the process of operation, the local side pressure acting on the flange fixing cover is distributed through the front of the ground part to prevent local wear and deformation of the parts and to effectively suppress unnecessary rotation of the bushing. have.

Excavator, Bucket Retention Structure, Mounting Flange, Arm Hinge

Description

Bucket mounting structure for using arm attachments in heavy construction equipment

1 is an exploded perspective view of a bucket fixing structure for construction machinery according to the present invention,

Figure 2 is a rear perspective view of the flange fixing cover according to an embodiment of the present invention,

3 is a schematic view showing a state in which the bucket is fixed to the arm hinge portion according to an embodiment of the present invention,

4 is a cross-sectional view taken along the line A-A shown in FIG.

5 is an enlarged view illustrating main parts of the mounting flange fixing part P of the bucket shown in FIG. 4;

6 is an enlarged view of main parts of a fixing flange fixing part of a bucket according to another embodiment of the present invention;

Explanation of symbols used in the main part of the drawing

1: bucket

2: mounting flange

3: arm hinge

6: bucket hinge

10: bushing

11: flange support

12: cover support

12a: support groove

20: flange fixing cover

22: grounding part

22a: grounding protrusion

23: gap adjusting member

The present invention relates to a bucket fixing structure for construction machinery, and more particularly, when the bucket is installed in the arm hinge, by distributing the local load of the fixing cover to maintain the tightening force strictly and to prevent the occurrence of flow or wear even for long-term use The present invention relates to a bucket fixing structure for an improved construction machine to firmly fix a bucket.

Conventionally, construction machines such as excavators and loaders are equipped with buckets at the arm hinges coupled to the boom of the upper swing structure, and since the buckets are typically used to excavate, load, or transport objects such as soil and rock, they are durable. Manufactured using steel materials of exceptional weight.

In general, the bucket is directly treated with the object under poor working conditions and receives a high load repeatedly, so frequent damage occurs on the main body or the mounting flange.If the work site is remote, a spare spare bucket is provided separately. The situation is to maintain the efficiency of the work.

In the conventional bucket fixing structure, the mounting flange of the bucket is typically assembled to the arm hinge portion by the hinge pin, the flange fixing cover is mounted on the outside of the mounting flange for pivoting the bucket, and the bucket cylinder for object processing. Alternatively, a high load acts near the arm hinge portion where the mounting flange, the flange fixing cover, and the bushing are coupled to the bucket posture adjustment by the extension and contraction drive of the arm cylinder.

In particular, the mounting flange and the flange fixing cover installed on the arm hinge must maintain the fixed position together with the bushing because repetitive rotation moment, side pressure and impact are continuously applied between the mounting flange and the arm hinge.

However, the conventional bucket fixing structure has a disadvantage in that lateral local pressure is intensively generated from the bushing protrusion of the mounting flange to the flange fixing cover side, causing severe local wear of the bushing.

In addition, there is a problem in that the bushing is rotated unnecessarily by loosening the gap between the mounting flange and the flange fixing cover as a result of pressing deformation of the component as a result of the long-lasting load of the local parts, and loosening of the fastening bolt for the flange fixing cover due to this problem. There was also a problem that caused the phenomenon or breakage of the mounting flange.

Therefore, the present invention has been made to solve the above problems,

SUMMARY OF THE INVENTION An object of the present invention is to provide a bucket fixing structure for construction machinery capable of dispersing lateral local pressure acting on a flange fixing cover to suppress local wear and rotation of the bushing and to prevent pressing deformation of parts.

In order to achieve the above object, the present invention

The present invention provides a bucket fixing structure for construction machinery for fixing a bucket having a mounting flange to the arm hinge portion by a hinge pin,

A bushing hole is formed in the mounting flange, and includes a flange support portion inserted into the bushing hole and a cover support portion extending from the flange support portion, the bushing being pinned to an outer side of the arm hinge portion so as to be adjacent to the inner wall of the mounting flange. ;

A ground part spaced apart from the outer wall of the mounting flange by an interview with the cover support part and a plurality of fastening parts radially spaced apart from the ground part by a hinge pin, and fixed to the outside of the mounting flange by the hinge pin. Flange fixing cover;

And a hinge pin pin-coupled to the arm hinge portion and rotatably fixing the bushing, the mounting flange, and the flange fixing cover to the arm hinge portion.

In addition, the present invention is a support groove groove spaced radially spaced at a predetermined interval on one side of the cover support portion of the bushing, one side of the ground portion of the flange fixing cover is radially spaced from the center coupling hole is installed in the support groove groove Characterized by a bucket fixing structure for a construction machine consisting of a ground projection.

In addition, the present invention protrudes to form a support projection spaced radially spaced at a predetermined interval on one side of the cover support portion of the bushing, the one side of the ground portion of the flange fixing cover is radially spaced from the center coupling hole to accommodate the support projections Characterized by a bucket fixing structure for construction machinery consisting of a ground groove.

In addition, the present invention is characterized in that the bucket fixing structure for a construction machine made of a gap adjusting member is further provided on the outer periphery of the cover support of the bushing.

In addition, the present invention is characterized in that the bucket fixing structure for the construction machine is formed so that both side walls of the gap adjusting member is fitted to each other to interview each other on the outer side wall of the mounting flange and the ground portion of the flange fixing cover.

In addition, the gap adjusting member is characterized in that the bucket fixing structure for construction machinery consisting of a steel core.

Hereinafter, a description of the bucket fixing structure for a construction machine according to the present invention is intended to explain the self invention having a common knowledge in the technical field to which the present invention can be easily implemented, which is why the claims of the present invention The technical spirit and scope described in the scope are not limited.

Referring to the configuration of the bucket fixing structure for construction machinery according to the present invention with reference to the accompanying drawings in detail as follows.

1 is an exploded perspective view of a bucket fixing structure for a construction machine according to the present invention, Figure 2 is a rear perspective view of the flange fixing cover according to an embodiment of the present invention, Figure 3 is an arm hinge portion according to an embodiment of the present invention 4 is a schematic cross-sectional view showing a state in which a bucket is fixed, FIG. 4 is a cross-sectional view taken along line AA of FIG. 3, FIG. 5 is an enlarged view of a main portion of a mounting flange fixing part P of the bucket shown in FIG. 4, and FIG. 6 is according to another embodiment of the present invention. An enlarged view of the main part of the mounting flange fixing part of the bucket.

In the description of the present invention, reference numeral 2 is a mounting flange of the bucket, 3 is an arm hinge portion which is formed at the tip of the arm to fix one side of the mounting flange, 6 is a bucket hinge portion fixing the other side of the mounting flange, 10 is a bushing, 20 shows the mounting cover, 23 shows the gap adjusting member.

1 and 2, the bucket fixing structure for a construction machine for fixing the bucket (1) having a mounting flange (2) to the arm hinge portion (3) by a hinge pin (5) To

A bushing hole 4 is formed in the mounting flange 2, and includes a flange support part 11 inserted into the bushing hole 4 and a cover support part 12 extending from the flange support part 11. A bushing (10) pinned to an outer side of the arm hinge portion (3) so as to be adjacent to an inner wall (2b) of the mounting flange (2);

A plurality of fastening portions which are spaced apart from the ground portion 22 and radially spaced apart from the ground portion 22 by being spaced apart from the outer wall 2a of the mounting flange 2 by interviewing the cover support portion 12. A flange fixing cover (20) fixed to the outside of the mounting flange (2) by the hinge pin (5);

Hinge pins that are pin-coupled to the arm hinge portion 3 and rotatably fix the bushing 10, the mounting flange 2, and the flange fixing cover 20 to the arm hinge portion 3. 5); including.

The flange fixing cover 20 has a central coupling hole 26 for pin coupling to the arm hinge portion 3 by the hinge pin (5), the fastening portion 21 is a central coupling hole ( 26 is formed radially spaced apart about the center.

In addition, the gap adjusting member 23 is further provided on the outer circumference of the cover support 12 of the bushing 10.

Both side walls (23a and 23b) of the gap adjusting member 23 is installed so as to interview each other on the outer wall (2a) of the mounting flange (2) and the ground portion 22 of the flange fixing cover 20, respectively, Preferably it is suitable to construct a shim of steel material.

In the present invention, the support groove (12a) spaced radially spaced at a predetermined interval on one side of the cover support portion 12 of the bushing 10, the one side of the ground portion 22 of the flange fixing cover 20 The ground projection 22a is radially spaced apart from the center coupling hole 26 to be installed in the support recess 12a.

The ground protrusion 22a is preferably formed integrally with the ground portion 22, but may be configured as a separate other protrusion.

A plurality of fixing members 24 are coupled to the fastening portion 21 of the flange fixing cover 20, and the fixing member 24 is the flange fixing cover 20, the gap adjusting member 23, and the bucket ( Fix the mounting flange (2) of 1) integrally.

According to another embodiment of the present invention, as shown in Figure 6, one side of the cover support portion 12 of the bushing (10) protruding to form a support projection (12b) radially spaced at a predetermined interval, the flange fixing cover On one side of the ground portion 22 of the (20) is radially spaced from the center coupling hole 26 is provided with a ground groove (22b) for receiving the support projection (12b).

In the embodiment of the present invention, a bucket hinge portion 6 connected to the bucket cylinder 13 is configured on one side of the mounting flange 2 coupled to the arm hinge portion 3, the bucket hinge portion ( 6) the bucket hinge pin 7 is pin-coupled, so that the bucket hinge portion 6 pivots up and down at a predetermined angle with respect to the arm hinge portion 3 by extension and contraction driving of the bucket cylinder 13. The box is similar to a known configuration, and one side of the bucket cylinder 13 is pivotally supported by an arm link 15 provided on the tip side of the arm 16 adjacent to the arm hinge 3.

In the description of the present invention, reference numeral 8 denotes a pinhole formed in the arm hinge portion 3, 9 is a pinhole of a bushing, 14 is an arm cylinder, 27 is a bolt hole of a mounting cover, 28 is a bolt hole of a shim, 29 Indicates the mounting flange fixing hole of the bucket.

Referring to the effect of the bucket fixing structure for construction machinery according to the present invention.

As shown in Figures 1 to 5, the bucket fixing structure for construction machinery according to the present invention, when the bucket cylinder 13 and the arm cylinder 14 is driven to extend and contract, the mounting flange (2) of the bucket (1) The bushing 10 and the mounting flange 2 are sequentially fixed by the hinge pin 5 on the arm hinge portion 3 so that) pivots with the bushing 10 relative to the arm hinge portion 3. .

Here, the gap adjusting member 23 is an outer circumference of the flange support 11 of the bushing 10 to maintain the gap between the side wall 23b of the mounting flange 2 and the ground 22 of the flange fixing cover 20. One side is fitted with a predetermined width, and is fixed integrally with the mounting flange 2 and the flange fixing cover 20 by a fixing member 24 inserted through the bolt hole 27 of the flange fixing cover 20. .

As shown in FIGS. 1 and 2, the ground portion 22 formed on the rear surface of the flange fixing cover 20 primarily maintains surface contact with the front end surface of the cover support portion 12 of the bushing 10. On one side of the grounding portion 22, a radial projection 22a protruding radially spaced apart from the center coupling hole 26 is installed in the support groove 12a of the bushing 10 to maintain secondary surface contact.

Accordingly, the lateral pressure acting toward the flange fixing cover 20 through the bushing 10 is grounded to the ground portion of the flange fixing cover 20 through the front end surface of the cover support 12 having a relatively large cross-sectional area through surface contact. 22) It is distributed and supported on the front. This effect can be understood as the local concentrated stress is dispersed to eliminate the wear or crushing deformation of the part.

At this time, the ground projection (22a) protruding from the ground portion 22 of the flange fixing cover 20 serves to suppress the rotation moment through the inner surface of the support groove (12a) of the bushing (10) bushing (10) Its own rotation is prevented. Of course, when the bucket 10 is rotated based on the arm hinge portion 3, the flange mounting cover 2 and the flange fixing cover 20, which are integrally fixed by the fixing member 24, are rotated when the flange fixing cover 20 is rotated. ), The ground protrusion 22a transmits a rotation moment to the inner surface of the support recess 12a of the bushing 10 to rotate approximately simultaneously.

Although not shown, according to another embodiment of the present invention, even if the gap adjusting member 23 is installed in parallel to interview on the inner surface (2b) of the mounting flange of the bucket (1) to prevent wear and pressing deformation due to pressure dispersion Of course.

On the other hand, according to another embodiment of the present invention, as shown in Figure 6, the support groove 12a spaced radially spaced at a predetermined interval on one side of the cover support portion 12 of the bushing 10 as the support protrusion 12b. Protruding to form, one side of the ground portion 22 of the flange fixing cover 20 is radially spaced from the center coupling hole 26 to constitute a ground groove (22b) for receiving the support projections (12b) Even if the lateral pressure acting toward the flange fixing cover 20 side through the bushing 10 is distributedly supported on the front of the ground portion 22 of the flange fixing cover 20 through the front end surface of the cover support 12, the flange Since the ground groove 22b of the fixing cover 20 and the support protrusion 12b of the bushing 10 are engaged with each other, the operation principle of transmitting the rotation moment and rotating the same time is substantially the same as described above, and thus, detailed description thereof will be omitted.

As described above, the bucket fixing structure for construction machinery according to the present invention distributes the lateral local pressure acting on the flange fixing cover through the front surface of the ground to prevent local wear and deformation of the parts and to effectively suppress unnecessary rotation of the bushing. Its effect is very excellent.

Claims (6)

In the bucket fixing structure for construction machinery for fixing a bucket having a mounting flange to the arm hinge portion by a hinge pin, A bushing hole is formed in the mounting flange, and includes a flange support portion inserted into the bushing hole and a cover support portion extending from the flange support portion, the bushing being pinned to an outer side of the arm hinge portion so as to be adjacent to the inner wall of the mounting flange. ; A grounding part spaced apart from the outer wall of the mounting flange in contact with the cover support part, and a plurality of fastening parts formed radially spaced apart from the grounding part, and fixed to the outside of the mounting flange by the hinge pin. Flange fixing cover; A hinge pin coupled to the arm hinge portion and rotatably fixing the bushing, the mounting flange, and the flange fixing cover to the arm hinge portion; And Consists of a gap adjusting member coupled to the outer wall of the mounting flange and the outer surface of the cover support portion of the bushing to be in contact with one side of the ground portion of the flange fixing cover, The support groove is spaced radially spaced radially spaced on one side of the cover support portion of the bushing, and one side of the ground portion of the flange fixing cover is radially spaced from the center coupling hole, and includes a ground protrusion installed in the support groove. Bucket structure for construction machinery, characterized in that. delete The method according to claim 1, A support groove spaced radially spaced apart at a predetermined interval is formed on one side of the cover support portion of the bushing, and one side of the ground portion of the flange fixing cover is radially spaced from a center coupling hole to accommodate the support protrusion. Bucket structure for construction machinery, characterized in that made. delete delete The method according to claim 1, The gap adjusting member is a bucket fixing structure for a construction machine, characterized in that consisting of a steel core.

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