KR20230172349A - Combination device of shank and tooth - Google Patents

Abstract

The shank and tooth coupling device according to the present invention is installed on the vibrating body of the vibration ripper and includes a shank with a coupling hole formed at the end, a tooth coupled to the end of the shank, inserted into the coupling hole, and an elastic support portion formed on the outer peripheral surface. It is provided with a fixing pin having pin fixing portions formed at both ends, and a coupling means for elastically supporting the tooth against the shank by an elastic support portion formed on the outer peripheral surface of the fixing pin and coupled with the pin fixing portion of the tooth and the fixing pin.

Description

Combination device of shank and tooth}

The present invention relates to a coupling device between a shank and a tooth, and more specifically, to a device for coupling the shank and teeth of a vibrating ripper for coupling the shank and teeth installed on the vibrating body of the vibrating ripper.

Generally, at construction sites, heavy equipment, such as a breaker or vibration ripper mounted on the boom of an excavator, is used to crush rock.

When the breaker uses a vibrating chisel to break relatively weak rock, the rock is broken and holes are formed, thereby reducing work efficiency. A vibration ripper is used to crush and excavate such weak soft rock ground.

Vibration ripper is published in Korean Patent Registration Nos. 0278296 and 096665.

The conventional vibration ripper configured as described above has a structure in which the tooth is coupled to the end of the shank connected to the vibrating body by a bolt and nut.

As described above, when the shank and tube of the vibrating ripper are connected using bolts, noise due to vibration is severe during work, which may become a cause of civil complaints.

In particular, when the tooth is worn or damaged, repair or replacement is necessary, but there is a problem in that bolts and nuts become stuck and cannot be loosened due to exposure to shock and vibration for a long period of time.

Considering this, the present inventor has applied for and received registration (Korean Patent Registration No. 10-1966935 (2019.04.02.)) for the shank and tooth fastening device of the vibrating ripper.

Republic of Korea Patent Registration No. 0278296 Republic of Korea Patent Registration No. 10-1966935 (April 2, 2019)

The present invention is intended to solve the problems described above, and the main purpose is to facilitate the coupling and separation of the shank and tooth of the vibration ripper, and to minimize the occurrence of clearance due to vibration during work by elastically supporting the tooth by the shank. Furthermore, the aim is to provide a shank and tooth coupling device that can reduce noise generation during excavation and arm crushing work.

Another object of the present invention is to provide a shank and tooth coupling device that can fundamentally prevent the fastening unit of the shank and the tooth from sticking.

The shank and tooth coupling device of the present invention for achieving the above object includes a shank installed on the vibrating body of the vibration ripper and having a coupling hole formed at the end, and a tooth coupled to the end of the shank,

A tooth is inserted into the coupling hole with respect to the shank, a fixing pin having an elastic support portion formed on an outer peripheral surface, and pin fixing portions formed on both ends, and an elastic member formed on the outer peripheral surface of the fixing pin by combining the tooth with the pin fixing portion of the fixing pin. It is characterized in that it is provided with a coupling means that allows the tooth to be elastically supported with respect to the shank by the support part.

The coupling means includes a pin fixing member that is coupled to pin fixing parts on both sides of a fixing pin coupled to the coupling hole of the shank, and a base rotatably supported on both sides of the tooth and installed on the base to form the pin fixing member. It includes a tooth fixing member having a fastening bolt part coupled to the fastening hole, and a fastening nut that is coupled to the fastening bolt part and allows the tooth to be elastically supported against the shank by an elastic support part.

The elastic support formed on the outer peripheral surface of the elastic fixing pin formed on the outer peripheral surface of the fixing pin has a thicker portion in contact with the lower surface than the thickness in contact with the upper surface of the coupling hole, so that the cross section is relative to the center of the cross section of the fixing pin. It is formed in an oval shape.

The coupling device of the shank and the tooth according to the present invention has an elastic support formed on the outer peripheral surface of the fixing pin coupled with the coupling hole of the shank, so that when the shank and the tooth are coupled to the coupling means, the elastic support is compressed by the coupling force, thereby providing resistance to the shank. The tooth is elastically supported to prevent shaking, and further prevents gaps from forming at the joint between the shank and the tooth. In particular, the noise generated as the tooth shakes against the shank due to vibration generated during excavation and crushing of soft rock can be reduced.

1 is a side view of a vibrating ripper equipped with a shank and tooth coupling device according to the present invention;
Figure 2 is an exploded perspective view of the shank and tooth coupling device shown in Figure 1;
Figure 3 is a cross-sectional view of a shank and tooth coupling device according to the present invention.
Figure 4 is a side cross-sectional view of a coupling device between a shank and a tooth according to the present invention.

The present invention relates to a device for combining a shank and a tooth, and an example thereof is shown in Figures 1 to 4.

Referring to the drawing, the shank tooth coupling device 10 according to the present invention is installed on the vibration ripper 100, and is installed on the vibrating body of the vibration ripper 100, and has a coupling hole (for coupling) on the end side. 21) is formed, and is coupled to the end of the shank 20 by a coupling means 40, and is elastically supported downward with respect to the shank 20, thereby suppressing vibration and preventing impact force and vibration ripper during use. A tooth 30 is provided to prevent the fastening member of the coupling means from loosening due to vibration.

The shank tooth coupling device according to the present invention configured as described above will be described in more detail for each component as follows.

The shank 20 is installed on the vibrating body of the vibrating ripper 100 to transmit the vibration and crushing force caused by the vibrating body to the tooth 30. Its cross-sectional area becomes smaller toward the end, and the side adjacent to the end has a shank as described later. A coupling hole 21 into which the fixing pin is coupled is formed. The coupling hole 21 is formed in a direction perpendicular to the longitudinal direction of the shank 20.

The tooth 30 has a coupling groove 31 into which the end of the shank 20 is coupled, which is formed from the upper side to the lower side. The shape of the tooth 30 has a structure with sharp ends (the vertical cross-section is an inverted triangle) to facilitate excavation or crushing of soft rock.

The coupling means 40 is for elastically coupling the tooth 30 to the shank 20 and includes a fixing pin 50 coupled to the coupling hole 21 of the shank 20.

The fixing pin 50 includes a rod-shaped pin body portion 51 and pin fixing portions 52 and 53 formed at both ends of the pin body portion 51. A groove is formed between the pin fixing parts 52 and 53 and the pin main body 51 so that the pin fixing parts 52 and 53 have a structure separated from the pin main body 51.

And, an elastic support portion 55 made of rubber or soft synthetic resin is formed on the outer peripheral surface of the pin body portion 51. The elastic support portion 55 is formed asymmetrically in thickness with respect to the longitudinal center of the pin body portion 51. To explain this in more detail, when the fixing pin 20 is coupled with the coupling hole 21, the lower surface on the tooth 40 side becomes relatively thick. Accordingly, the center of the cross section of the elastic support portion 55 has a structure that is biased downward with respect to the center of the pin body portion 51.

The coupling means 40 is coupled to the pin fixing parts 52 and 53 on both sides of the fixing pins 50 on both sides of the tooth 30 and provides a coupling force of the tooth 30 to the shank 20. 45) is provided.

The fastening portion 45 is formed with tooth support grooves 35 and 36 with open tops on both sides of the tooth 30, and each tooth support groove 35 and 36 is provided with first and second tooth fixing members ( The first and second base parts (46a) (47a) of 46) (47) are respectively coupled, and the first and second base parts (46a) (47a) are directed upward through the openings of the tooth support grooves (35) (36). First and second fastening bolt parts (46b) (47b) extending to are installed.

Support jaws may be formed on the first and second fastening bolts 46b and 47b to support the first and second fixing pin members 48 and 49, respectively. However, it is not limited to this, and the nuts may be screwed together to limit the support positions of the first and second fixing pin members.

And first and second pin fixing members 48 and 49 having through holes 48a and 49a are installed in the first and second pin fixing parts 52 and 53 of the fixing pin 50, and the first , The first and second fastening bolts (46b) (47b) are inserted into each through hole formed in the two pin fixing members (48) (49) and combined with the first and second fastening nuts (46c) (47c).

At this time, the first and second pin fixing members (52) (53) and the first and second pin fixing members (48) (49) of the fixing pin (50) are joined to the first and second pin fixing members (48) (49). ) and form first and second insertion grooves (48b) (49b) into which the first and second pin fixing parts (52) and (53) are inserted. The first and second insertion grooves are formed. Guide support portions 48c and 49c are formed on one side of the fixing members 48 and 49 so that the groove forming portion formed on the fixing pin 50 can be guided.

Meanwhile, the fastening part is not limited to the above-described embodiment, and is fastened after forming coupling holes at both ends of the fixing pin 50, that is, the first and second pin fixing parts 52 and 53, and inserting a fastening bolt. It can also be achieved by combining a bolt and a fastening nut.

remind

In the shank and tooth coupling device according to the present invention configured as described above, a fixing pin 50 with an elastic support portion 55 is inserted into the coupling hole 21 when the shank 20 and the tooth 30 are coupled. Since both ends of the fixing pin 50 are coupled to both sides of the tooth 30 by a fastening part, shaking and vibration of the tooth 30 with respect to the shank 20 can be prevented.

This will be described in more detail, and the first and second fastening bolts (46b) coupled to the first and second pin fixing members (48) (49) while inserted into the coupling groove (31) of the tooth (30) of the shank (20). ) (47b) and the first and second fastening nuts (46c) (47c) are combined, and when the first and second fastening nuts (46c) (47c) are tightened, the tooth (30) is coupled to the shank (20). It is pulled toward the fixing pin (50). At this time, the elastic support portion 55 is compressed to elastically bias the tooth 30 toward the end of the shank 20. Therefore, the tooth 30 is firmly coupled to the end of the shank.

It is possible to fundamentally solve the problem of noise generated by the teeth 30 vibrating against the shank 20 due to equipment vibration or drilling impact during soft rock crushing and excavation work in this state.

In particular, when using the vibration ripper 100 in which the shank 20 and the tooth 30 are combined as described above for a long period of time, the first and second fastening bolts (46c) (47c) and the first and second fastening nuts (46c) (47c) is prevented from loosening, and even if some of the first and second fastening nuts (46c) (47c) are loosened, the tooth (30) is elastically supported by the elastic support portion (55) of the fixing pin (50), preventing vibration and The generation of noise can be reduced.

The elastic support portion 55 formed on the outer peripheral surface of the pin body portion 51 has a thin upper portion and a relatively thick lower portion with respect to the center of the pin body portion 51, so that the first and second fastening bolts 46b ) By tightening the first and second fastening nuts (46c) (47c) to (47b), the elastic bearing capacity of the tooth (30) with respect to the shank (20) can be improved.

As described above, the coupling device of the shank and the tooth according to the present invention can elastically support the tooth with respect to the shank, thereby fundamentally preventing the generation of noise due to vibrational shock during rock crushing and excavation work.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached registered claims.

Claims (3)

A shank installed on the vibrating body of the vibrating ripper and having a coupling hole formed at the end, and a tooth coupled to the end of the shank,
The fixing pin is inserted into the coupling hole of the shank, has an elastic support formed on the outer peripheral surface, and pin fixing parts are formed on both ends, and the elastic support part is coupled with the pin fixing part of the tooth and the fixing pin and is formed on the outer peripheral surface of the fixing pin. A coupling device between a shank and a tooth, characterized in that the tooth is provided with a coupling means that allows the tooth to be elastically supported against the shank. According to clause 1,
The coupling means includes a pin fixing member that is coupled to pin fixing parts on both sides of a fixing pin coupled to the coupling hole of the shank, and a base rotatably supported on both sides of the tooth and installed on the base to form the pin fixing member. A coupling device between a shank and a tooth, comprising a tooth fixing member having a fastening bolt part coupled to a fastening hole, and a fastening nut coupled to the fastening bolt part so that the tooth is elastically supported against the shank by an elastic support part. According to claim 1 or 2,
A coupling device between a shank and a tooth, characterized in that the elastic support formed on the outer peripheral surface of the fixing pin has a thicker portion in contact with the lower surface than the thickness in contact with the upper surface of the coupling hole.

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