KR101641273B1 - Installation structure of a counterweight for heavy construction equipment - Google Patents

Abstract

The present invention relates to a counterweight mounting structure for a construction machine in which a counterweight mounting structure is improved so as to reduce the number of assembly and operation when a support mounting portion of a counterweight is installed on a mounting support of a vehicle body. Bracket mounting holes; A nut-integrated bracket having a plurality of fasteners and mounted on a bottom surface of the bracket mounting hole; A first guide installed on one side of the inner surface of the bracket mounting hole for supporting one side of the upper surface of the nut integrated type bracket so as to prevent the bracket mounting hole from being detached; A second guide installed at a predetermined distance on one side of the inner surface of the bracket mounting hole and supporting one side of the nut integrated type bracket; And a fixing member that is coupled to the fixture through the mounting support to fix the integral bracket and fixture.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a counterweight for a construction machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterweight mounting structure for a construction machine, and more particularly, to a construction machine for a counterweight mounting structure for a counterweight mounting structure, To a counterweight installation structure for a counterweight.

Generally, the counterweight is mounted on the rear of the body frame where the engine room is installed in order to balance the construction machine including the excavator. When assembling a weight counterweight to the rear of the body frame, it should be installed in a predetermined position to minimize assembly deviation. Also, it should be possible to perform bolting work efficiently to fix the counterweight in a structurally correct position.

If the assembly deviation is large, the balance of the construction machine can not be maintained, and the running performance of the road surface or the operation device is deteriorated. Therefore, various attempts have been made to develop various techniques concerning the assembly deviation and the mounting efficiency of the counterweight.

BACKGROUND ART [0002] In the prior art, a technique relating to adjustment of an assembling deviation of a counterweight is disclosed in Korean Patent Laid-Open Publication No. 2008-0060584 (published on July 2, 2008). The above-described conventional technique requires a separate shim and a welding member when assembling the counterweight, or when the counterweight is shaken due to a gap between before and after attaching / detaching of the counterweight, or when the counterweight is lifted from the vehicle body when the equipment is rolled over, In order to solve the problem, a counterweight assembly deviation adjustment device is proposed in which the mounting position is adjusted in the forward and backward directions in accordance with the adjustment of the length of the end of the adjustment bolt passing through the through hole for mounting the counterweight.

However, the above-described conventional technique is suitable for a counterweight for a forklift, which is a relatively small construction machine, and is structurally complicated. If the end of the adjustment bolt is in direct contact with the inner surface of the support groove of the counterweight, if the vibration is severely generated, it may cause damage due to contact between the adjustment bolt and the counter weight or severe damage. Which causes a disconnection accident.

On the other hand, in the case of a large construction machine such as an excavator or a wheel loader, in the process of mounting and assembling a large counterweight, it is difficult for an operator to separate the components including bolts and nuts from the fixed position, There is a problem that the assembly deviation can not be controlled properly due to difficulties.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a counterweight, So that the assembling work can be easily performed. SUMMARY OF THE INVENTION

In addition, the embodiment of the present invention provides a counterweight installation structure for a construction machine in which component elements fastened to a bolt in a mounting and assembling process of a counterweight can stably maintain a correct position through a guide and a separation prevention structure It has its purpose.

In order to achieve the above object,
A mounting support protruding from the engine room side toward the rear of the construction machine; and a support mounting portion for opening the bottom surface and the inlet so that the ceiling surface is closely contacted with the mounting support on the mounting support, A counter weight mounting structure for a construction machine,
A bracket mounting hole spaced at an arbitrary distance from one side of the upper portion of the support mounting portion and having an opening to be opened;
A nut-integrated bracket having a plurality of fasteners and mounted on a bottom surface of the bracket mounting hole;
A first guide installed on one side of the inner surface of the bracket mounting hole for supporting one side of the upper surface of the nut integrated type bracket so as to prevent the bracket mounting hole from being detached;
A second guide installed at a predetermined distance on one side of the inner surface of the bracket mounting hole and supporting one side of the nut integrated type bracket;
A plurality of insert holes formed through the counterweight between the ceiling surface of the support mounting portion and the bottom surface of the bracket mounting hole;
The upper surface of the mounting support is brought into close contact with the ceiling face of the support mounting portion to fix the mounting support, the counterweight and the nut-integrated bracket to the insert hole of the mounting support and the insert hole of the counterweight, The present invention provides a counterweight installation structure for a construction machine, comprising:

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The second guide according to the present invention is fixedly installed on an inner side surface of the bracket mounting hole on which the first guide is installed.

The counterweight installation structure for a construction machine according to the present invention further comprises a third guide installed on one side of a longitudinal wall surface of the bracket mounting hole for supporting one side of the upper surface of the nut- .

The first guide and the third guide are configured to constrain the upper surface of the nut-integrated bracket so as to suppress upward movement or flow of the nut-integrated bracket.

In addition, the bracket mounting hole is characterized by a counterweight mounting structure for a construction machine extending from an open inlet to a closed end wall at a predetermined depth.

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The counterweight installation structure for a construction machine according to the present invention improves the work efficiency by improving the guide and supporting structure at the mounting point for bolting and fixing in the process of assembling and installing the counterweight in the mounting support, Can be greatly reduced.

In addition, it is possible to maintain the assembly tolerance of the counterweight by adjusting the mounting position of the second guide so as to match the dimension of the insert hole of the support mounting portion and the nut integral type bracket.

1 is a perspective view schematically showing a counterweight mounted on an excavator according to an embodiment of the present invention,
FIG. 2 is a perspective view showing a nut-integrated type bracket according to an embodiment of the present invention, FIG.
3 is a perspective view schematically showing an assembly state of a counterweight according to an embodiment of the present invention,
4 is a perspective view schematically showing an assembled state of a counterweight at a support mounting portion side according to an embodiment of the present invention.
DESCRIPTION OF THE REFERENCE NUMERALS to main parts of the drawings
11; Nut integrated bracket
20; Counterweight
21; Support mounting part
22; First Guide
23; Second Guide
24; Third Guide
25; Bracket mounting hole
28; Mounting Support

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may legally define the concept of a term in order to best describe its invention And it should be construed as meaning and concept consistent with the technical idea of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view schematically showing a counterweight mounted on an excavator according to an embodiment of the present invention. Reference numeral 1 is a schematic view of a cab, 2 is a boom, 3 is an arm, 4 is a bucket cylinder, 5 is an upper frame, 6 is an engine room, 7 is a boom cylinder, 8 is an arm cylinder, 10 is a bucket, 20 is a counterweight, and 25 is a bracket mounting hole.

1 to 4, a counterweight installation structure for a construction machine according to an embodiment of the present invention includes:

A mounting support 28 protruding from a side of the engine room 6 toward the rear of the construction machine; a support mounting portion 21 having a bottom surface and an opening for opening and closing the ceiling surface on the mounting support 28; And a counterweight (20) for assembling the counterweight (20) by inserting the mounting support (28) into the support mounting part (21)

A bracket mounting hole (25) spaced at a predetermined distance on one side of the support mounting portion (21) and having an opening to be opened;

A nut-integrated bracket 11 having a plurality of fixtures 14 and mounted on a bottom surface of the bracket mounting hole 25;

A first guide 22 installed on one side of the inner surface of the bracket mounting hole 25 for supporting one side of the upper surface of the nut integrated type bracket 11 so as to prevent the bracket 11 from being separated from the bracket mounting hole 25;

A second guide (23) installed at a predetermined distance on one side of the inner surface of the bracket mounting hole (25) and supporting one side of the nut integral type bracket (11);
A plurality of insert holes 26 formed through the counterweight 20 between the ceiling surface of the support mounting portion 21 and the bottom surface of the bracket mounting hole 25;

In order to secure the mounting support 28, the counterweight 20 and the nut-integrated bracket 11 by bringing the upper surface of the mounting support 28 into close contact with the ceiling surface 21b of the support mounting portion 21, And a fixing member 15 which penetrates the insert hole 27 of the mounting support 28 and the insert hole 26 of the counterweight 20 and is engaged with the fixture 14 of the nut integrated type bracket 11 .

The mounting support 28 can be supported by the vehicle body of the engine room 6 or the upper frame 5 and comprises a frame including a steel member inserted into the support mounting portion 21 to a predetermined depth. In addition, a plurality of insert holes 27 formed through the mounting support 28 from the upper portion to the lower portion thereof for the insertion of the fixing member 15 are formed.

The support mounting portion 21 is formed in a groove structure having an open bottom so that a sidewall surface 21a extends below the top surface 21b of the support mounting portion 21, And the termination bottom has a structure that is structurally opened to communicate with the outside.

The bracket mounting hole 25 is formed to extend from the opened inlet to a closed end wall 25c at a predetermined depth. That is, the inside of the bracket mounting hole 25 includes inner side surfaces 25a and 25b extending to the end wall surface 25c, a ceiling surface 25d, and a bottom surface 25e.

The bracket mounting hole 25 is formed on one side of the support mounting portion 21. The bracket mounting hole 25 is formed between the ceiling surface 21b of the support mounting portion 21 and the bottom surface 25e of the bracket mounting hole 25, A plurality of insert holes 26 are formed.

The first guide 22 has a substantially rectangular channel structure and is formed on an inner surface of the bracket mounting hole 25 so as to support the upward movement of the nut integral type bracket 11, And has a height that restrains the top surface 12.

The height of the first guide 22 means a spacing between the bottom surface 25e of the bracket mounting hole 25 and the bottom surface of the first guide 22. The height of the bottom surface 25e of the first guide 22, So that the nut integral type bracket 11 is prevented from being detached by restricting the upper surface 12 of the nut integral type bracket 11.

A plurality of second guides 23 are formed at a predetermined interval on one side of the inner surface of the bracket mounting hole 25. The second guide 23 includes a bracket mounting hole (25a or 25b) opposite to one side (25a or 25b) of the base (25).

In order to support the side surface of the nut integrated type bracket 11, the second guide 23 includes a block structure which is arranged continuously or discontinuously at predetermined intervals along the longitudinal direction of the nut integrated type bracket 11 Lt; / RTI >

For example, the first guide 22 and the second guide 23 described above are counterweights for large construction machines. In view of the support performance regarding vibration, shaking and weight in the vertical direction or the left- It can be deformed into a fixed or support element.

Meanwhile, the counterweight installation structure for a construction machine according to the embodiment of the present invention is installed on one side of the end wall 25c of the bracket mounting hole 25, And a third guide 24 for supporting one side of the surface 12.

The third guide 24 has a substantially rectangular channel structure and is formed on one side of the longitudinal wall 25c of the bracket mounting hole 25 so that the upper end of the construction machine or the counterweight (12) of the nut-integrated bracket (11) so as to inhibit movement or flow towards the nut-integrated bracket (11).

The height of the third guide 24 is a spacing distance between the bottom surface 25e of the bracket mounting hole 25 and the bottom surface of the third guide 24. The height of the bottom surface 25e of the third guide 24, And the upper surface 12 formed on the longitudinal end side of the nut integral type bracket 11 is restrained to prevent the nut integral type bracket 11 from being detached from the longitudinal end side.

In one embodiment of the present invention, it is preferable that the fixing member 15 is formed of a bolt member, and the fixing member 14 is composed of a nut member for bolting and screwing. However, the fixing member 15 has a structure in which the insert hole 27 of the mounting support 28 and the ceiling face 21b of the support mounting portion 21 and the bracket mounting hole 25 Is fixed to an insert hole 26 formed between the mounting support 28 and the support mounting portion 21 of the counterweight 20 and the nut integral bracket 11 It can be variously modified as a fastening element including a pin member and a fixing bar.

When the counterweight for a construction machine according to the embodiment of the present invention is assembled, the upper portion of the mounting support 28 is tightly engaged with the ceiling face 21b of the support mounting portion 21, The respective insert holes 26 and 27 are aligned.

The nut-integrated bracket 11 has its bottom surface 13 provided in the bracket mounting hole 25. In this process, the upper surface 12 of the nut-integrated bracket 11 is fixed to the bottom surface of the first guide 22 And one side surface of the nut-integrated bracket 11 is guided to the second guide 23. The fixture 14 of the nut integral bracket 11 is aligned with the insert holes 26, 27 described above.

When the third guide 24 is provided on the end wall 25c of the bracket mounting hole 25 in the embodiment of the present invention, the end of the nut-integrated bracket 11 provided in the bracket mounting hole 25 And the upper surface 12 of the part is fitted under the bottom surface of the third guide 24.

For the mounting of the counterweight, the fastening member 15 is fastenable through the aligned insert holes 26, 27 and fastener 14. For example, the worker can easily perform the bolting work on the fastener 14 without causing a problem that the conventional nut is excited or deviated from the fastening position due to the pushing force of the fastening member 15. This is because the upper surface 12 of the nut integral bracket 11 is supported by the bottom surface portion of the first guide 22 and the bottom surface portion of the third guide 24 when the operator pushes up the fixing member 15, .

Thus, the construction of the counterweight for a construction machine according to the present invention is improved by improving the guide and supporting structure at the mounting point for bolting and fixing in the process of assembling and installing the counterweight 20 in the mounting support 28 The efficiency of the work can be improved and the work flow can be greatly reduced.

It is also possible to maintain the assembly tolerance of the counterweight 20 by adjusting the mounting position of the second guide 23 so as to match the dimensions of the insert hole 26 of the support mounting portion 21 and the nut integral bracket 11 . For example, the guiding and supporting position between the nut-integrated bracket 11 and the second guide 23 can be set in advance in the bracket mounting hole 25, so that even if vibration, swinging and clearance occur, the counterweight 20 ) Can be maintained.

While the above embodiments have been described in detail with reference to the accompanying drawings and embodiments, the accompanying drawings and the embodiments are illustrative and explanatory in order to facilitate understanding of the present invention by those skilled in the art . Accordingly, the above-described embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention should be construed in accordance with the invention as set forth in the appended claims, Various modifications, alternatives, and equivalents according to the present invention.

The present invention is used to install a counter weight for a construction machine through a counterweight mounting structure so as to reduce the number of assembly and operation when a support mounting portion of a counterweight is installed on a mounting support of a vehicle body.

Claims (5)

A mounting support protruding from the engine room side toward the rear of the construction machine; and a support mounting portion for opening the bottom surface and the inlet so that the ceiling surface is closely contacted with the mounting support on the mounting support, A counter weight mounting structure for a construction machine,
A bracket mounting hole spaced at an arbitrary distance from one side of the upper portion of the support mounting portion and having an opening to be opened;
A nut-integrated bracket having a plurality of fasteners and mounted on a bottom surface of the bracket mounting hole;
A first guide installed on one side of the inner surface of the bracket mounting hole for supporting one side of the upper surface of the nut integrated type bracket so as to prevent the bracket mounting hole from being detached;
A second guide installed at a predetermined distance on one side of the inner surface of the bracket mounting hole and supporting one side of the nut integrated type bracket;
A plurality of insert holes formed through the counterweight between the ceiling surface of the support mounting portion and the bottom surface of the bracket mounting hole;
The upper surface of the mounting support is brought into close contact with the ceiling face of the support mounting portion to fix the mounting support, the counterweight and the nut-integrated bracket to the insert hole of the mounting support and the insert hole of the counterweight, And a fixing member for supporting the counterweight. The method according to claim 1,
Wherein the second guide is fixedly installed on an inner surface of the bracket mounting hole, the first guide being opposed to a side surface of the bracket mounting hole. 3. The method according to claim 1 or 2,
Further comprising a third guide installed at one side of a longitudinal wall surface of the bracket mounting hole for supporting one side of the upper surface of the nut integrated type bracket so as to prevent the bracket mounting hole from being separated. The method of claim 3,
Wherein the first guide and the third guide are configured to constrain an upper surface of the nut-integrated bracket so as to suppress upward movement or flow of the nut-integrated bracket. The method of claim 3,
Wherein the bracket mounting hole extends from an opened inlet to a closed end wall at a predetermined depth.

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