WO2021246814A1

WO2021246814A1 - Tooth adapter

Info

Publication number: WO2021246814A1
Application number: PCT/KR2021/006974
Authority: WO
Inventors: 김정엽; 박해지; 임현준; 윤희문; 이청래
Original assignee: 두산인프라코어 주식회사
Priority date: 2020-06-05
Filing date: 2021-06-03
Publication date: 2021-12-09

Abstract

A tooth adapter, according to various embodiments of the present invention, for coupling a tooth point to a working device of a construction machine comprises: a coupling part coupled to the working device; and a nose part formed at the front end of the coupling part to be coupled to the tooth point, wherein the nose part can include: a top surface part including an inclined part of which at least a partial region is inclined with respect to the longitudinal axis when viewed from the side; a bottom surface part of which at least a partial region is formed in parallel to the longitudinal axis; side surface parts including a one-side surface part and an other-side surface part which connect the top surface part and the bottom surface part; and a front surface part formed at the front end of the nose part.

Description

tooth adapter

The present invention relates to a tooth adapter, and more particularly, to a tooth adapter used in a construction machine.

In general, an excavator, which is a type of construction machine, is a civil engineering machine used to mine soil or rocks. A bucket is installed in the front part of the excavator body for mining and temporarily storing soil or rocks. Since the bucket is in preferential contact with the excavation target such as soil or rock, one or more tooth adapters are connected to the end through welding or bolts to strengthen the excavation work and prevent direct wear, and the tooth point, which is a wear member, is separate from the tooth adapter. It is fastened through the holding device or holding system of

The tooth adapter has a protruding portion (nose) to support the tooth point, and the tooth point is fitted while covering the protruding portion (nose) of the tooth adapter. In order to bind the tooth point and the tooth adapter, the holding device is fastened in a state of being inserted, and through this, the tooth point and the tooth adapter are maintained in a fixed state.

During excavation, stress is generated between the tooth point and the tooth adapter, and if the generated stress is large, the service life of the tooth point and the tooth adapter may be reduced accordingly.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a tooth adapter having reduced stress generated between the tooth point and the tooth adapter during operation.

A tooth adapter according to various embodiments of the present invention is a tooth adapter for coupling a tooth point to a working device of a construction machine, wherein a coupling part coupled to the working device and a front end of the coupling part are formed to engage the tooth point an upper surface portion including a nose portion, wherein the nose portion includes an inclined portion in which at least a partial region is inclined with respect to a front-rear axis when viewed from the side; a lower surface in which at least a partial area is formed parallel to the front-rear axis; a side portion including one side portion and the other side portion connecting the upper surface portion and the lower surface portion; and a front part formed at the front end of the nose part.

Preferably, the upper surface portion and the lower surface portion may be formed asymmetrically with respect to the front-rear axis.

Preferably, the upper surface portion may include a parallel portion disposed in front of the inclined portion and having at least a partial region parallel to the front-rear axis.

Preferably, at least one side of the one side part and the other side part may be provided with a coupling groove concave inwardly provided to have a predetermined diameter to be fastened to the tooth point.

Preferably, the coupling groove portion may be formed to have a smaller diameter toward the inside.

Preferably, a first additional surface for increasing a surface area may be formed on at least one of the one side portion and the other side portion.

Preferably, the first additional surface may be concave inwardly in the width direction.

Preferably, the first additional surface may be convex outwardly in the width direction.

Preferably, the upper edge of the front part may be formed in an arch shape in which the upper middle part is convex upward when viewed from the front.

Preferably, the coupling portion, the upper leg coupled to the upper surface of the front end of the working machine; a lower leg coupled to a lower surface of the front end of the working machine; and a seating surface on which a rear end surface of the tooth point is seated when combined with the tooth point.

Preferably, a stepped portion is formed on one side in the vertical direction of the seating surface, and the stepped portion may be formed to be inclined downward toward the front when viewed from the side.

Preferably, the left-right width L3 of the upper edge of the front part may be smaller than the left-right width L2 of the lower edge of the front part.

Preferably, the left-right width L2 of the lower edge of the front part may be formed in a range of 0.4 times to 0.7 times the front-back direction length L1 of the nose part.

The tooth adapter according to various embodiments of the present invention can minimize the stress generated by the working load by increasing the contact surface with the tooth point and dispersing the load acting on the contact surface of the tooth adapter and the tooth point during operation.

In addition, stress generated on the contact surface of the tooth adapter and the tooth point is reduced, thereby improving the service life of the tooth adapter.

1 is a view conceptually illustrating a state in which a tooth adapter is coupled to a tooth point according to various embodiments of the present invention;

Figure 2 is a view showing a state in which the tooth adapter according to various embodiments of the present invention is coupled to the bucket.

3 is a perspective view of a tooth adapter according to various embodiments of the present invention;

4 is a side view of a tooth adapter according to various embodiments of the present invention as viewed from the side;

5 is a front view of a tooth adapter according to various embodiments of the present invention as viewed from the front;

6 is a view showing control factors in the shape of a tooth adapter according to various embodiments of the present invention;

Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings for convenience of description. In describing the reference numerals for the components of each drawing, the same components are denoted by the same reference numerals as much as possible even if they are displayed on different drawings.

The principle that terms or words used in the present specification and claims should not be limited to their ordinary or dictionary meanings, and the inventor may appropriately define the concept of a term to best describe his/her invention It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is 'connected' or 'coupled' to another component, the component may be directly connected or coupled to the other component, but another component is between the component and the other component. It should be understood that elements may be 'connected' or 'coupled'.

Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be water and variations. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted.

The construction machine 1 described in the present invention may include an excavator, a wheel loader, a dozer, and the like. Hereinafter, a case in which the construction machine 1 is an excavator will be described. However, due to this, the tooth adapter 100 of the present invention is not limited to being installed in the bucket 10 of the excavator, and it is obvious that it can be applied to a wheel loader, a dozer, and the like.

The tooth adapter 100 proposed in the present invention is for coupling the tooth point 500 to a working device such as the bucket 10 of the excavator. The tooth point 500 is mounted on the tip of the bucket 10 of the excavator through the tooth adapter 100 and can be used to improve the excavation performance for an excavation target such as soil or rock.

Since the tooth point 500 is in direct contact with the excavation target, it is a consumable that is inevitably worn in proportion to the excavation work time. Accordingly, the tooth point 500 is replaced after use for a certain period of time, and the tooth point 500 is detachably coupled to the tooth adapter 100 for replacement. Since the tooth point 500 is detachably coupled to the tooth adapter 100 in various ways, there is a gap between the tooth point 500 and the contact surface of the tooth adapter 100 during operation.

A tooth that is in direct contact with the tooth point 500 by vertical or horizontal loads acting on the tooth point 500 during operation in a state in which the tooth adapter 100 and the tooth point 500 are combined. A considerable load is also applied to the nose portion 110 of the adapter 100 , and accordingly, abrasion may proceed on the surface of the nose portion 110 .

Accordingly, an object of the present invention is to provide a tooth adapter 100 having an improved service life by minimizing the stress generated in the nose portion 110 due to a load caused by work.

Hereinafter, a tooth adapter 100 according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram conceptually illustrating a state in which a tooth adapter according to various embodiments of the present invention is coupled to a tooth point, and FIG. 2 is a view illustrating a state in which a tooth adapter according to various embodiments of the present invention is coupled to a bucket. 3 is a perspective view of a tooth adapter according to various embodiments of the present invention, FIG. 4 is a side view of a tooth adapter according to various embodiments of the present invention, and FIG. 5 is a view of the tooth adapter according to various embodiments of the present invention It is a front view of the tooth adapter as viewed from the front, and FIG. 6 is a view showing control factors in the shape of the tooth adapter according to various embodiments of the present invention.

Hereinafter, in a state in which the bottom plate 11 of the bucket 10 is disposed to face the ground as shown in FIG. 1 , the direction toward the ground will be described as 'downward' or 'downward', and the opposite direction is referred to as 'upward' Alternatively, it may be described as 'upper side'. In addition, the direction in which the side plates 15 of the bucket 10 face each other may be described laterally, or it may be described in the left and right directions. In a state in which the tooth adapter 100 is coupled to the bucket 10 , the direction toward the bucket 10 may be described as the rear, and the opposite direction may be described as the front.

1 to 6, the tooth adapter 100 according to various embodiments of the present invention is provided to couple the tooth point 500 to the bucket 10 of the excavator, the coupling part 180 and the nose part (110) may be included. In addition, the nose portion 110 is a portion that is received and coupled to the inside of the opening of the tooth point 500 when combined with the tooth point 500 , and includes a front portion 111 , an upper surface portion 113 , a lower surface portion 117 , and a side portion. (115).

First, the front portion 111 is a surface forming the front end of the nose portion 110, and may be provided in a planar shape substantially perpendicular to the front-rear axis CL as shown in FIG. 4 . An upper surface portion 113 , a side portion 115 , and a lower surface portion 117 may be formed to extend rearwardly from each corner of the front portion 111 . The front portion 111 may be generally formed in a rectangular shape having a width greater in the left and right directions than in the vertical direction. In one embodiment, the left-right width L3 of the upper edge 111a of the front part 111 may be formed to be smaller than the left-right width L2 of the lower edge 111b, so that when viewed from the front, it is generally It may be formed in a trapezoidal shape with a predetermined curvature applied to the upper side. In one embodiment, the upper edge 111a of the front part 111 may be formed in an arc shape with a central portion convex upward when viewed from the front. In the present invention, due to the shape of the trapezoidal front part 111 to which the arch shape is applied to the upper side, the front end surface of the socket of the tooth point 500 can be in stable contact. Since the upper edge 111a of the front part 111 has a predetermined curvature and is formed in an arc shape, the upper surface part 113 extending rearward from the upper edge 111a of the front part 111 also has a curvature in the left and right directions. It can be formed to have a , and through this, it is possible to disperse the stress generated in the upper surface portion 113 .

In one embodiment, as the width L2 in the left and right directions of the lower edge 111b of the front part 111 decreases, the stress acting on the rear upper surface part 113 of the nose part 110 may decrease, but it is too small. When formed, the contact area of the tooth point 500 with the front end surface of the socket may decrease, so that contact stability may be reduced, and the stress caused by the side load of the front upper surface portion 113 of the nose portion 110 may increase. Accordingly, in the exemplary embodiment, the left-right width L2 of the lower edge 111b of the front part 111 of the nose part 110 is 0.40 to 0.70 times the front-back direction length L1 of the nose part 110. It can be formed to be More preferably, it may be formed to be 0.5 to 0.6 times.

The upper surface part 113 and the lower surface part 117 of the nose part 110 proposed by the present invention may be formed asymmetrically with respect to the front-rear axis CL as shown in FIG. 3 .

First, the upper surface part 113 may refer to the upper surface of the nose part 110 formed above the front-rear axis CL as shown in FIG. 4 . The upper surface portion 113 may be described as including a parallel portion 113a and an inclined portion 113b.

The parallel portion 113a is an area adjacent to the front portion 111 of the upper surface portion 113 , and at least some areas may be formed parallel to the front-rear axis CL. The parallel portion 113a may be disposed in front of the inclined portion 113b. In the present invention, since the parallel portion 113a is formed parallel to the front-rear axis CL, the support point of the force against the vertical load applied from the upper side can be stably formed in front of the nose portion 110 as much as possible.

The inclined portion 113b is a region disposed behind the above-described parallel portion 113a among the upper surface portion 113 , and at least some regions may be formed to be inclined with respect to the front-rear axis CL. The inclined portion 113b may be inclined upward toward the rear. The inclined portion 113b may be curved to protrude upward with a predetermined curvature when viewed from the side. In the present invention, since the inclined portion 113b is formed to be curved, the contact area of the tooth point 500 with the inner circumferential surface of the socket can be increased, so that the load applied by the operation can be distributed.

In addition, in the present invention, the upper surface part 113 is formed to extend backward from the arch shape of the front part 111 , and to be curved such that the central part protrudes upward when viewed from the front, like the shape of the upper corner of the front part 111 . can Accordingly, it is possible to further increase the contact area of the tooth point 500 with the inner circumferential surface of the socket.

As described above, in the present invention, by forming the upper surface portion 113 to be curved in the front-rear direction and/or left and right directions, the contact area with the tooth point 500 is increased to stabilize the tooth point 500 when working with the stress dispersing effect. can be supported by

In the present invention, the lower surface portion 117 may refer to a lower surface of the nose portion 110 formed below the front-rear axis CL as shown in FIG. 1 . Unlike the above-described upper surface portion 113 , in the present invention, at least a partial region of the lower surface portion 117 may be formed parallel to the front-rear axis CL. Accordingly, the upper surface portion 113 and the lower surface portion 117 may be provided in an asymmetric shape with respect to the front axis.

The lower surface portion 117 may be formed as a flat surface. Through this flat shape, a stable surface contact is formed in a large area by making the point of support of the force to be located in front of the nose portion 110 as much as possible with respect to the vertical load applied from the lower side. make it possible In addition, if you look at the cross-section, the upper surface is curved, but the lower surface is asymmetrical with a straight line applied, which prevents the tooth point and the tooth adapter from being twisted during work in terms of geometry, improving fastening stability.

The side part 115 may be formed to extend rearwardly from the front part 111 between the upper surface part 113 and the lower surface part 117 . The side part 115 may include one side part 115a forming one side of the nose part 110 in the left and right direction, and the other side part 115b forming the other side opposite thereto.

The left-right distance between the one side part 115a and the other side part 115b may be formed to be narrow at the top and wider toward the bottom. In addition, as described above, since the front part 111 is formed in a generally trapezoidal shape in which the left-right spacing of the upper edge is smaller than the left-right spacing of the lower edge, the side part 115 extending from the front part 111 is naturally curved. can be formed. Under the condition that a vertical load or a lateral load is applied due to this bending, the contact area between the socket of the tooth point 500 and both side parts 115 of the nose part 110 can be maximized, so that the load can be distributed. In addition, since both side parts 115 are formed in a shape that diverges in a direction away from each other from the front to the rear, the area of the both side parts 115 becomes wider, and the tooth point 500 can be stably supported during operation. be able to

In an exemplary embodiment, at least one side of the one side part 115a and the other side part 115b has a coupling groove 140 concave inwardly provided to have a predetermined diameter in order to be fastened with the tooth point 500. can be formed. The coupling groove 140 may have a circular cross-section, and the diameter of the coupling groove 140 may be formed to decrease toward the inside. In an exemplary embodiment, a support device 400 having a corresponding shape is inserted into the coupling groove 140 to be coupled to the tooth point 500 in various ways. In an embodiment, the defect groove portion may be disposed close to the seating surface 185 to be described later in the side portion 115 . When the center of the coupling groove 140 moves away from the front part 111 of the nose part 110 , the maximum stress acting on the tooth adapter 100 increases, and the center of the coupling groove part 140 moves to the front part 111 . If it is too close, the stress acting on the coupling groove 140 increases. Therefore, the coupling groove 140 is preferably formed at a position that is 0.60 to 0.80 times the length L in the front-rear direction of the lower surface 117 of the nose portion 110 from the front portion 111 .

In an exemplary embodiment, a first additional surface 150 for increasing a surface area may be formed on at least one of the one side portion 115a and the other side portion 115b. The first additional surface 150 may be formed to have a different depth in the width direction from other regions of the side portion 115 , thereby increasing the surface area of the side portion 115 . The first additional surface 150 may be provided in various shapes. In an embodiment, the first additional surface 150 may be convex outwardly in the width direction. In an embodiment, the first additional surface 150 may be concave inwardly in the width direction. The first additional surface 150 may be formed to extend long in the front-rear direction, and may be formed to communicate with the above-described coupling groove 140 . By forming the first additional surface 150 on the surface of the side portion 115 , the contact area of the tooth point 500 with the inner peripheral surface of the socket may be increased.

On the other hand, the tooth adapter 100 according to various embodiments of the present invention may include a coupling part 180 for coupling with the front end of the bucket 10 . The coupling part 180 may be formed at the rear end of the above-described nose part 110 . The coupling unit 180 may include an upper leg 181 coupled to the upper surface of the front end of the bucket 10 , and a lower leg 182 coupled to the lower surface of the front end of the bucket 10 . The upper leg 181 and the lower leg 182 may be formed to extend rearwardly from the rear end of the nose portion 110 , respectively. Here, an imaginary axis extending in a direction parallel to the extending direction of the lower leg 182 has been described as the aforementioned front-rear axis CL.

In addition, the coupling unit 180 may include a seating surface 185 on which the rear end surface of the tooth point 500 is seated when coupled to the tooth point 500 . In an exemplary embodiment, a stepped portion 190 may be formed on one side in the vertical direction of the seating surface 185 . The stepped portion 190 may function as a second additional surface that increases the contact area when combined with the tooth point 500 . In one embodiment, the stepped portion 190 may be formed to be inclined downward toward the front when viewed from the side, but is not limited thereto, and provided in any shape that can increase the contact area with the rear end surface of the tooth point 500 it could be

Meanwhile, the tooth point 500 may be detachably coupled to the front end of the bucket 10 through the tooth adapter 100 described above. The tooth point 500 may be provided in various shapes to perform an efficient operation. A socket formed concavely in a shape corresponding to the shape of the above-described nose part 110 may be provided at the rear end of the tooth point 500, and both are coupled in a state in which the nose part 110 is accommodated inside the socket. can In an exemplary embodiment, the support device 400 may be coupled while being inserted into the coupling groove portion 140 formed in the side portion 115 of the nose portion 110, but is not limited thereto, and the tooth point 500 and the tooth adapter In order to bind (100), it may be combined by various bonding methods known to those of ordinary skill in the art.

As described above, according to various embodiments of the present invention, by maximizing the contact area when the nose portion 110 of the tooth adapter 100 is coupled with the tooth point 500, it acts on the tooth adapter 100 during operation. load can be distributed.

In the present invention, the upper surface portion 113 and the lower surface portion 117 of the nose portion 110 are formed in an asymmetric shape, and the upper surface portion 113 is divided into a parallel portion 113a and an inclined portion 113b to reduce the load. It can be made so that the internal stress is dispersed.

Accordingly, it is possible to increase the wear resistance of the nose portion 110 and increase the wear life of the tooth adapter 100 .

In the above, even though it has been described that all the components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as 'include', 'comprise', or 'have' described above mean that the component may be inherent unless otherwise stated, so other components are excluded. Rather, it should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims

In the tooth adapter for coupling a tooth point to a working device of a construction machine,

A coupling portion coupled to the working device and a nose portion formed at the front end of the coupling portion and coupled to the tooth point,

The nose part when viewed from the side,

an upper surface portion including an inclined portion in which at least a partial region is formed to be inclined with respect to a front-rear axis;

a lower surface in which at least a partial area is formed parallel to the front-rear axis;

a side portion including one side portion and the other side portion connecting the upper surface portion and the lower surface portion; and

A tooth adapter including a front portion formed at the front end of the nose portion.
According to claim 1,

The upper and lower surfaces of the tooth adapter are formed asymmetrically with respect to the front-rear axis.
According to claim 1,

The upper surface portion is disposed in front of the inclined portion and includes a parallel portion in which at least a partial region is formed parallel to the front-rear axis.
According to claim 1,

At least one side of the one side part and the other side part is formed with a coupling groove concavely provided inwardly to have a predetermined diameter to be fastened to the tooth point.
5. The method of claim 4,

The coupling groove portion is formed such that the diameter becomes smaller toward the inside of the tooth adapter.
According to claim 1,

A tooth adapter in which a first additional surface for increasing a surface area is formed on at least one of the one side portion and the other side portion.
7. The method of claim 6,

The first additional surface is a tooth adapter which is formed concavely inwardly in the width direction.
7. The method of claim 6,

The first additional surface is a tooth adapter formed to be convex outwardly in the width direction.
According to claim 1,

The upper edge of the front part is a tooth adapter in which the upper middle part is formed in an upward convex arch shape when viewed from the front.
According to claim 1,

The coupling part,

an upper leg coupled to the upper surface of the front end of the working machine;

a lower leg coupled to a lower surface of the front end of the working machine; and

A tooth adapter including a seating surface on which a rear end surface of the tooth point is seated when combined with the tooth point.
11. The method of claim 10,

A stepped portion is formed on one side in the vertical direction of the seating surface, and the stepped portion is formed to be inclined downward toward the front when viewed from the side.
According to claim 1,

The left-right width (L3) of the upper edge of the front part is formed smaller than the left-right width (L2) of the lower edge of the front part.
According to claim 1,

The left-right width (L2) of the lower edge of the front part is a tooth adapter formed in a range of 0.4 times to 0.7 times the front-back direction length (L1) of the nose part.