KR20230166215A - Excavator having hinge portion of separation prevention structure - Google Patents

Abstract

The present invention relates to an excavator having a hinge part with an O-ring separation prevention structure. First, in the hinge structure in which the O-ring is installed, an O-ring separation prevention device is installed in the holder of the bucket at the hinge part to elastically support the O-ring. By maintaining the position of the O-ring, you can effectively prevent it from coming off. Second, it not only effectively prevents the O-ring from coming off, but also moves the tightening bolt back and forth to properly adjust the elastic force applied to the O-ring, thereby properly controlling the position and wear level of the O-ring. It also prevents the O-ring from coming away, preventing foreign substances (e.g. For example, by preventing the inflow of sand, etc., failure or damage to the hinge part can be effectively prevented and maintenance costs can be significantly reduced. Third, pin covers are fastened to both ends of the pin to effectively prevent the pin from coming off, and the O-ring separation prevention device is not exposed to the outside, making the appearance more attractive.

Description

Excavator having a hinge with an O-ring separation prevention structure {EXCAVATOR HAVING HINGE PORTION OF SEPARATION PREVENTION STRUCTURE}

The present invention relates to an excavator having a hinge portion with an O-ring separation prevention structure. More specifically, in the hinge portion structure in which the O-ring is installed, an O-ring separation prevention device is installed on the holder of a bucket at the hinge portion, thereby providing an O-ring (O-ring). It relates to an excavator having a hinge portion with an O-ring separation prevention structure that can effectively prevent separation of the O-ring by maintaining the position of the O-ring by elastically supporting the -ring).

In general, excavators are widely used for various purposes at construction sites, such as scooping up sediment and transporting it to the truck bed, crushing and transporting asphalt or rock, and dismantling buildings.

Figure 1 is a side view showing the joint structure of the hinge part of the boom and arm of a general excavator, and Figure 2 is a cross-sectional view showing the pin connection structure of the hinge part of the general excavator.

As shown in FIG. 1, a general excavator 1 is equipped with a cab (not shown) that turns left and right, and moves on a certain trajectory by driving an engine (not shown) as a moving means at the bottom of the cab. A track or wheel (not shown) that moves along is installed, and in the front of the cab, the boom (3) and arm (4) are interconnected in a hinge structure so that they move up and down according to the drive of the hydraulic cylinder (5). do. And at the tip of the arm (4), buckets (6) for directly digging up soil and transporting it into the truck's loading box are interconnected with a hinge structure, and are configured to perform joint movement by driving a hydraulic cylinder.

When driving an excavator and placing it at a desired point and trying to scoop up and transport the vomit, the boom (3), arm (4), and bucket (6) are jointly moved according to the operator's operation, so that the vomit is collected in the bucket (6). Since this is contained, the driver's cab can be rotated to transport the vomit contained in the bucket (6) to another location or into the truck's loading box.

As shown in Figure 2, the hinge structure of the arm 4 and the bucket 6 has a pin hole H formed at the end of the arm 4 and the holder 6a of the bucket 6. And the pin (9) is inserted into the pin hole (H). A hwanjak (9a) is formed on one end of the pin (9), and a stop ring (8) is coupled to the other end of the pin (9) to prevent it from coming off after fastening. In order to increase the coupling force of the stop ring (8), the stop pin (7) is penetrated and coupled to the stop ring (8) and the pin (9), and a nut (7a) is fastened to the end of the stop pin (7) to secure it. .

And the outer periphery of both ends of the pin (9) is designed to prevent interference between the end of the arm (4) and the holder (6a) of the bucket (6), to prevent wear, and to prevent foreign substances (e.g., sand, etc.) from entering. An O-ring (O) is installed for

However, in the pin connection structure of the hinge portion of a conventional excavator, the impact force applied to the bucket (6) during work is directly transmitted to the pin (P), and this force is transmitted to the stop pin (7), nut (7a), and O-ring (O). As the nut (7a) is randomly loosened, the O-ring (O) is separated, and foreign matter is introduced, the hinge unit frequently breaks down, resulting in a large maintenance cost.

Republic of Korea Registration No. 20-0343651 (Registration Date: February 23, 2004) Republic of Korea Patent Publication No. 10-2009-0061357 (publication date: June 16, 2009)

The present invention was invented to solve the above problems, and the first object of the present invention is to form a pin hole at the end of the arm and the holder of the bucket, insert a pin into the pin hole, and attach the arm to the outer periphery of the pin. In the hinge part structure where an O-ring is installed to prevent interference between the end and the bucket holder, prevent wear, and prevent foreign substances (e.g. sand, etc.) from entering, the hinge part prevents the O-ring from being removed from the bucket holder. The purpose of the present invention is to provide an excavator having a hinge portion with an O-ring separation prevention structure that can effectively prevent the O-ring from being separated by maintaining the position of the O-ring by installing a device to elastically support the O-ring.

In addition, the second purpose of the present invention is to effectively prevent the O-ring from coming off, as well as to appropriately adjust the elastic force applied to the O-ring by moving the tightening bolt forward and backward, thereby appropriately controlling the position and degree of wear of the O-ring, and preventing the O-ring from coming off. The aim is to provide an excavator with a hinge part with an O-ring separation prevention structure that can prevent foreign substances (for example, sand, etc.) from entering, effectively preventing failure or damage to the hinge part and significantly reducing maintenance costs.

In order to achieve the above object, the excavator having a hinge portion with an O-ring separation prevention structure according to the present invention has a pin hole formed at the end of the arm and the holder of the bucket, and the pin A pin (pin or shaft) is inserted into the hole, and an O-ring is placed around the outer circumference of the pin to prevent interference between the end of the arm and the holder of the bucket, prevent wear, and prevent foreign substances from entering. In the excavator having this installed hinge portion, an O-ring separation prevention device is installed on the holder to prevent the O-ring from separation.

The O-ring separation prevention device according to an embodiment of the present invention includes a spring that is inserted into a through hole formed through the holder to elastically support the O-ring; an o-ring push bracket fixed to the front end of the spring and positioned to surround the outer peripheral surface of the o-ring; An adjusting bolt is fixed to the rear end of the spring and inserted into the through hole to expand and contract the spring while moving forward and backward to prevent the O-ring from being separated; a fixing nut that is fixedly installed at an end of the through hole to be screwed to the tightening bolt and allows the tightening bolt to move forward and backward as the tightening bolt rotates; and a pin cover (cover-pin) coupled to the end of the pin to prevent the pin from being separated and to prevent the fixing nut from being exposed. It has features including:

Preferably, the through hole is formed evenly at 120 degrees around the pin hole, and a tool insertion groove for inserting a driver to rotate the tightening bolt is formed on the back of the tightening bolt.

In addition, an O-ring separation prevention device according to another embodiment of the present invention includes an O-ring push bracket positioned to surround the outer peripheral surface of the O-ring; a push rod inserted into the through hole and extending from the O-ring push bracket; A tightening bolt that is inserted into the through hole, is overlapped with the push rod inserted therein, and presses the push rod while moving forward and backward to prevent the O-ring from being separated; a spring installed in the tightening bolt to elastically support the push rod; a fixing nut fixedly installed at an end of the through hole to be screwed to the tightening bolt and allowing the push rod to move forward and backward according to rotation of the tightening bolt; and a pin cover coupled to an end of the pin to prevent the pin from being separated and the fixing nut to be exposed. It has features including:

In this way, the present invention has the following effects.

First, in the hinge part structure where the O-ring is installed, an O-ring separation prevention device is installed in the bucket holder at the hinge part to elastically support the O-ring, thereby effectively preventing the O-ring from being separated by maintaining the position of the O-ring.

Second, it not only effectively prevents the O-ring from coming off, but also moves the tightening bolt back and forth to properly adjust the elastic force applied to the O-ring, thereby properly controlling the position and wear level of the O-ring. It also prevents the O-ring from coming away, preventing foreign substances (e.g. For example, by preventing the inflow of sand, etc., failure or damage to the hinge part can be effectively prevented and maintenance costs can be significantly reduced.

Third, pin covers are fastened to both ends of the pin to effectively prevent the pin from coming off, and the O-ring separation prevention device is not exposed to the outside, making the appearance more attractive.

Figure 1 is a side view showing the hinge structure of the boom and arm of a typical excavator.
Cross-sectional view showing the pin connection structure of the hinge portion of a typical excavator in Figure 2
Figure 3 is an exploded perspective view showing an O-ring separation prevention device according to an embodiment in an excavator having a hinge portion of the O-ring separation prevention structure according to the present invention.
Figure 4 is an enlarged view of part A of Figure 3
Figure 5 is a longitudinal cross-sectional view of Figure 3
Figures 6 and 7 are cross-sectional views illustrating preventing the O-ring from being separated while moving forward and backward by loosening or tightening the tightening bolt in the O-ring separation prevention device according to an embodiment of the present invention.
Figure 8 is a cross-sectional view illustrating preventing the O-ring from being separated while moving forward and backward by loosening or tightening the tightening bolt in the O-ring separation prevention device according to another embodiment of the present invention.

Hereinafter, an excavator having a hinge portion with an O-ring separation prevention structure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as “comprise” or “have” are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

In addition, the components of the embodiments described with reference to each drawing are not limited to the corresponding embodiments, and may be implemented to be included in other embodiments within the scope of maintaining the technical spirit of the present invention, and may also be included in separate embodiments. Even if the description is omitted, it is natural that a plurality of embodiments may be re-implemented as a single integrated embodiment.

In addition, when describing with reference to the accompanying drawings, identical or related reference numbers will be assigned to identical or related elements regardless of the drawing symbols, and overlapping descriptions thereof will be omitted.

In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

Prior to describing the present invention, the following specific structural and functional descriptions are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms. It should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the specification.

Figure 3 is an exploded perspective view showing an O-ring separation prevention device according to an embodiment in an excavator having a hinge portion of the O-ring separation prevention structure according to the present invention, Figure 4 is an enlarged view of portion A of Figure 3, and Figure 5 is an enlarged view of part A of Figure 3. 3 is a longitudinal cross-sectional view, and Figures 6 and 7 are cross-sectional views explaining how to prevent the O-ring from coming off while moving forward and backward by loosening or tightening the tightening bolt in the O-ring separation prevention device according to an embodiment of the present invention.

As shown in Figures 3 to 7, the excavator having a hinge part with an O-ring separation prevention structure according to the present invention has a pin hole (H) formed at the end of the arm (4) and the holder (6a) of the bucket (6). A pin (9) is inserted into the pin hole (H), and the outer circumference of the pin (9) prevents interference between the end of the arm (4) and the holder (6a) of the bucket (6), prevents wear, and removes foreign substances. It has a hinge structure in which an O-ring (O) is installed to prevent (e.g., sand, etc.) from flowing in, and an O-ring separation prevention device ( 100)(200) is characterized in that it is installed. Here, the holder 6a refers to a flange portion for connecting the end of the arm 4 to the bucket 6.

Blood (9) of the present invention refers to a shaft or mounting pin connecting the arm (4) and the bucket (6). And the unexplained symbol G (shown in FIGS. 7 and 8) refers to the gap between the end of the arm 4 and the holder 6a of the bucket 6, and an O-ring (O) is installed in the gap. .

Hereinafter, the O-ring separation prevention device 100 according to an embodiment of the present invention will be described.

The O-ring separation prevention device 100 according to an embodiment of the present invention includes a spring 120 that is inserted into the through hole 110 formed through the holder 6a of the bucket and elastically supports the O-ring (O); An O-ring push bracket 130 fixed to the front end of the spring 120 and positioned to surround the outer peripheral surface of the O-ring (O); A tightening bolt 140 is fixed to the rear end of the spring 120 and is inserted into the through hole 110 to expand and contract the spring 130 while moving forward and backward to prevent the O-ring (O) from being separated; A fixing nut 150 is fixedly installed at the end of the through hole 110 to be screwed to the tightening bolt 140 and allows the tightening bolt 140 to move forward and backward according to the rotation of the tightening bolt 140; and a pin cover (160) coupled to the end of the pin (9) to prevent the pin (9) from being separated and to prevent exposure of the fixing nut (150); It has features including:

Looking specifically at the components of the O-ring separation prevention device 100 according to an embodiment of the present invention, a through hole 110 is formed through the holder 6a of the bucket 6, and the through hole 110 is formed. Can be formed evenly around the pin hole (H) at a certain angle, for example, 120 degrees. The angle and number of through holes 110 are not limited to this embodiment and may be changed depending on design conditions.

The spring 120 is inserted into the through hole 110 and is configured to elastically support the O-ring (O).

The O-ring push bracket 130 is fixed to the front end of the spring 120 and is positioned to surround the outer peripheral surface of the O-ring (O). The O-ring push bracket 130 is formed as a curved surface to surround a portion of the outer surface of the O-ring (O).

The tightening bolt 140 is inserted into the through hole 110 and is fixed to the rear end of the spring 120 to expand and contract the spring 130 while moving forward and backward to prevent the O-ring (O) from being separated.

That is, by allowing the O-ring push bracket 130 to elastically support the O-ring (O) due to the expansion and contraction (extension and contraction) of the spring 130, it effectively prevents the O-ring (O) from coming off by maintaining the position of the O-ring (O). Try to prevent it.

It is preferable that a tool insertion groove 141 be formed at the rear of the tightening bolt 140 for inserting a tool, for example, a driver (D), to rotate the tightening bolt 140.

The fixing nut 150 is fixedly installed at the end of the through hole 110 to be screwed to the tightening bolt 140.

For screw coupling, a threaded portion 151 is formed on the inner periphery of the fixing nut 150, and a threaded portion 141 is formed on the outer periphery of the tightening bolt 140. This screw connection structure allows the tightening bolt 140 to move forward and backward according to the rotation of the tightening bolt 140.

The pin cover 160 is coupled to both ends of the pin 9 to prevent the pin 9 from being separated and to prevent the fixing nut 150 from being exposed.

A screw-type coupling groove 161 may be formed in the center of the pin cover 160 for coupling both ends of the pin 9.

As shown in Figures 6 and 7, in the O-ring separation prevention device 100 according to an embodiment of the present invention configured as described above, the driver (D) is inserted into the tool insertion groove 141 formed on the rear side of the tightening bolt 140. ) and turn it to move the tightening bolt 140 forward and backward as it rotates clockwise or counterclockwise.

As the tightening bolt 140 moves forward and backward, the O-ring push bracket 130 elastically supports the O-ring (O) by expanding and contracting the spring 130, thereby maintaining the position of the O-ring (O). Effectively prevent departure.

Meanwhile, Figure 8 is a cross-sectional view illustrating preventing the O-ring from being separated while moving forward and backward by loosening or tightening the tightening bolt in the O-ring separation prevention device according to another embodiment of the present invention.

Referring to Figure 8, the O-ring separation prevention device 200 according to another embodiment of the present invention includes an O-ring push bracket 220 positioned to surround the outer peripheral surface of the O-ring (O); A push rod 230 inserted into the through hole 210 and extending from the O-ring push bracket 220; A tightening bolt 240 is inserted into the through hole 210, and the push rod 230 is inserted and installed to overlap the inside, and pressurizes the push rod 230 while moving forward and backward to prevent the O-ring (O) from being separated; A spring 250 installed in the tightening bolt 240 to elastically support the push rod 230; A fixing nut 260 that is fixedly installed at the end of the through hole 210 to be screwed to the tightening bolt 240 and allows the push rod 230 to move forward and backward according to the rotation of the tightening bolt 240; and a pin cover (270) coupled to the end of the pin (9) to prevent the pin (9) from being separated and to prevent exposure of the fixing nut (250); It has features including:

Looking specifically at the components of the O-ring separation prevention device 200 according to another embodiment of the present invention, a through hole 210 is formed through the holder 6a of the bucket 6, and the through hole 210 is formed. Can be formed evenly around the pin hole (H) at a certain angle, for example, 120 degrees.

The O-ring push bracket 220 is positioned to surround the outer peripheral surface of the O-ring (O).

The push rod 230 is inserted into the through hole 210 and extends from the O-ring push bracket 220.

The tightening bolt 240 is inserted into the through hole 210, and the push rod 230 is inserted into the tightening bolt 240 to be installed in an overlapping structure. The tightening bolt 240 presses the push rod 230 while moving forward and backward to prevent the O-ring (O) from being separated.

It is preferable that a tool insertion groove 241 for inserting a driver (D) into the tightening bolt 240 to rotate the tightening bolt 240 is formed at the rear of the tightening bolt 240.

The spring 250 is installed in the tightening bolt 240 and serves to elastically support the push rod 230.

The fixing nut 260 is fixedly installed at the end of the through hole 210 to be screwed to the tightening bolt 240. For screw coupling, a threaded portion 261 is formed on the inner periphery of the fixing nut 260 and a threaded portion 241 is formed on the outer periphery of the tightening bolt 240. This screw connection structure allows the tightening bolt 240 to move forward and backward according to the rotation of the tightening bolt 240.

The pin cover 270 is coupled to both ends of the pin 9 to prevent the pin 9 from being separated and to prevent the fixing nut 260 from being exposed.

A screw-type coupling groove 271 may be formed in the center of the pin cover 270 for coupling both ends of the pin 9.

As shown in FIG. 8, in the O-ring separation prevention device 200 according to another embodiment of the present invention configured as described above, the end of the driver (D) is inserted into the tool insertion groove 241 formed on the rear of the tightening bolt 240. Insert and turn to move the tightening bolt 240 forward and backward as the tightening bolt 240 rotates clockwise or counterclockwise. The push rod 230 elastically supports the O-ring (O) by stretching and contracting the spring 250 as the tightening bolt 240 moves forward and backward, thereby maintaining the position of the O-ring (O) and preventing the O-ring (O) from coming off. effectively prevent.

In this way, the present invention has the following effects.

First, in the hinge part structure where the O-ring is installed, an O-ring separation prevention device is installed in the bucket holder at the hinge part to elastically support the O-ring, thereby effectively preventing the O-ring from being separated by maintaining the position of the O-ring.

Second, it not only effectively prevents the O-ring from coming off, but also moves the tightening bolt back and forth to properly adjust the elastic force applied to the O-ring, thereby properly controlling the position and wear level of the O-ring. It also prevents the O-ring from coming away, preventing foreign substances (e.g. For example, by preventing the inflow of sand, etc., failure or damage to the hinge part can be effectively prevented and maintenance costs can be significantly reduced.

Third, pin covers are fastened to both ends of the pin to effectively prevent the pin from coming off, and the O-ring separation prevention device is not exposed to the outside, making the appearance more attractive.

Meanwhile, the specification and drawings disclose preferred embodiments of the present invention, and although specific terms are used, they are used in a general sense to easily explain the technical content of the present invention and to aid understanding of the present invention. It is not intended to limit the scope of the invention. In addition to the embodiments disclosed herein, it is obvious to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented.

For example, the technology of the present invention is equally applied to the hinge portion of the arm and the bucket, as well as the hinge portion of the arm and the boom. And it is not limited to excavators and can be equally applied to other heavy equipment.

4: arm
6: bucket
6a: Bucket holder
9: pin
100: O-ring separation prevention device of an embodiment of the present invention
110: Through hole
120: spring
130: O-ring push bracket
140: Tightening bolt
141: Tool insertion groove
150: fixing nut
160: pin cover
161: Threaded coupling groove
200: O-ring separation prevention device of another embodiment of the present invention
210: Through hole
220: O-ring push bracket
230: push rod
240: Tightening bolt
250: spring
260: fixing nut
270: pin cover
271: Threaded coupling groove
D: driver
H: pin hole
O: O-ring

Claims (4)

A pin hole (H) is formed at the end of the arm (4) and the holder (6a) of the bucket (6), a pin (9) is inserted into the pin hole (H), and on the outer circumference of the pin (9) In the excavator (10) having a hinge portion provided with an O-ring (O) to prevent interference between the end of the arm (4) and the holder (6a) of the bucket (6), prevent wear, and prevent foreign substances from entering, An excavator having a hinge portion with an O-ring separation prevention structure, characterized in that an O-ring separation prevention device (100) (200) is installed on the holder (6a) to prevent separation of the O-ring (O). According to paragraph 1,
The O-ring separation prevention device 100,
A spring 120 that is inserted into the through hole 110 formed through the holder 6a to elastically support the O-ring (O);
an O-ring push bracket 130 fixed to the front end of the spring 120 and positioned to surround the outer peripheral surface of the O-ring (O);
A tightening bolt 140 is fixed to the rear end of the spring 120 and is inserted into the through hole 110 to expand and contract the spring 130 while moving forward and backward to prevent the O-ring (O) from being separated;
A fixing nut 150 is fixedly installed at the end of the through hole 110 to be screwed to the tightening bolt 140, and enables the tightening bolt 140 to move forward and backward according to the rotation of the tightening bolt 140. ); and
A pin cover (160) coupled to the end of the pin (9) to prevent the pin (9) from being separated and to prevent the fixing nut (150) from being exposed; An excavator having a hinge portion with an O-ring separation prevention structure, including a. According to paragraph 1,
The through hole 110 is formed evenly at 120 degrees around the pin hole (H), and a driver (D) is inserted into the rear of the tightening bolt 140 to insert a tool to rotate the tightening bolt 140. An excavator having a hinge portion with an O-ring separation prevention structure, characterized in that a groove 141 is formed. According to claim 1,
The O-ring separation prevention device 200,
an O-ring push bracket 220 positioned to surround the outer peripheral surface of the O-ring (O);
A push rod 230 inserted into the through hole 210 and extending from the O-ring push bracket 220;
A tightening bolt is inserted into the through hole 210, and the push rod 230 is inserted and installed to overlap the inside, and prevents the O-ring (O) from being separated by pressing the push rod 230 while moving forward and backward. (240);
A spring 250 installed in the tightening bolt 240 to elastically support the push rod 230;
A fixing nut 260 is fixedly installed at the end of the through hole 210 to be screwed to the tightening bolt 240 and enables the push rod 230 to move forward and backward according to the rotation of the tightening bolt 240. ); and
A pin cover (270) coupled to the end of the pin (9) to prevent the pin (9) from being separated and to prevent the fixing nut (250) from being exposed; An excavator having a hinge portion with an O-ring separation prevention structure, including a.

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