JP2022093886A - Tooth attaching/detaching structure for bucket and bucket - Google Patents

Abstract

To provide a tooth attaching/detaching structure capable of preventing dropping and separation of the tooth from an adapter by abutting and locking a freely engaging recessed part of a slip-off preventive member to a protrusion of the adapter, and allowing easy removal and exchange of the tooth by releasing abutting and locking of the slip-off preventive member to the protrusion.SOLUTION: In a tooth attaching/detaching structure, an engaging and disengaging part 5 is formed to a tooth 3, an engaging and disengaging hole 5a with a stop end is formed to the engaging and disengaging part, an engaging and disengaging rod part 2a engageable/disengageable with the engaging and disengaging part is formed to an adapter 2, protrusions M1, M1 are formed on both side faces of the adapter, respectively, and an external force applied to the tooth is received by engagement contact of the engaging and disengaging hole of the tooth with the engaging and disengaging rod part of the adapter. Slip-off preventing mechanisms N, N that have slip-off preventive members 6, 6 preventing separation of the tooth from the adapter are provided on both sides of the engaging and disengaging part of the tooth. Freely engaging recessed parts N1, N1 engageable/disengageable with the protrusions of the adapter are formed to the slip-off preventive members, and the separation of the tooth from the adapter is prevented by abutting and locking of the freely engaging recessed parts with the protrusions.SELECTED DRAWING: Figure 1

Description

The present invention relates to a tooth attachment / detachment structure for a bucket used in an excavator-type excavator and a bucket thereof.

Conventionally, as this type of bucket tooth attachment / detachment structure and its bucket, a cast iron adapter is projected on the tip side of the bucket of an excavator system excavator, and the cast iron tooth is detachably projected onto the adapter by the attachment / detachment mechanism. As the attachment / detachment mechanism, a fitting / detaching portion is formed in the tooth, an excavation tip edge portion is formed in the tip portion of the tooth, and a blind hole-shaped fitting / removing hole is formed in the fitting / removing portion. A fitting / removing rod portion that can be fitted / removed is formed in the fitting / removing hole, a vertical square hole is formed in the above adapter and tooth, a fitting / removing rod portion is inserted in the fitting / removing hole, and a square elastic material is inserted in the vertical square hole. It is known that the adapter and the tooth are detachably configured by inserting and inserting the square pin into the vertical square hole and inserting and removing the square pin.

However, various anti-soil work such as excavation work of ground and piping pits, peeling work of asphalt pavement layer, soil crushing work, soil leveling work, etc. using the excavation tip edge of the tooth and the front and back surfaces of the tooth. The one with the structure to do is known.

Patent No. 6628080

However, in the case of the above-mentioned conventional structure, when excavation work or the like is performed using the excavation tip edge portion of the tooth, the front surface and the back surface of the tooth, hard soil, when the excavation tip edge portion of the tooth plate portion of each tooth is penetrated. It may collide with rocks, gravel, etc. and apply an impact force more than expected, and due to such harsh soil work, the square pin of the attachment / detachment mechanism between each tooth and each adapter may be damaged. There is a possibility that the tooth will come off from the adapter due to such a failure of the attachment / detachment mechanism, and it will be difficult to work with soil due to the tooth coming off, which may reduce the workability with soil, and it may be lost due to the tooth coming off. This has the inconvenience that a new tooth is required and the economic efficiency may be reduced.

The present invention aims to solve these inconveniences, and in the invention of claim 1, an adapter is projected from the tip end side of a bucket of an excavator-based excavator, and the adapter is provided. The tooth is detachably projected by the attachment / detachment mechanism, and as the attachment / detachment mechanism, a fitting / detaching portion is formed in the tooth, and a pre-stop hole-shaped fitting / removing hole is formed in the fitting / removing portion. A fitting / removing portion that can be fitted / removed is formed in the fitting / removing hole, protrusions are formed on both side surfaces of the adapter, and external force applied to the tooth is applied to the fitting / removing hole of the tooth and the fitting / removing portion of the adapter. The structure is such that it is received by fitting contact, and a retaining mechanism having a retaining member for preventing the tooth from detaching from the adapter is provided on both sides of the fitting / detaching portion of the tooth, and the retaining member is provided on the protrusion of the adapter. For buckets, a loose fitting recess that can be fitted and removed is formed, and the loose fitting recess and the protrusion are contact-locked to prevent the tooth from coming off the adapter. It has a tooth attachment / detachment structure.

Further, in the invention according to claim 2, a male threaded portion is formed on the retaining member, a female threaded portion is formed on the fitting / detaching portion of the tooth, and the retaining member is attached to the tooth by the screwing structure of the male threaded portion and the female threaded portion. The invention is characterized in that it is freely arranged in the fitting / removing portion of the above, and the invention according to claim 3 has the above-mentioned tooth with the screw-on structure of the male-threaded portion and the female-threaded portion of the retaining member. The invention is characterized in that the protrusion is formed in a tapered conical trapezoidal shape, and the loose fitting recess is formed in the invention according to claim 4. It is characterized in that it is formed in a wide opening shape that can be loosely fitted to the conical trapezoidal protrusion.

Further, the invention according to claim 5 is in a bucket comprising the bucket tooth attachment / detachment structure according to any one of claims 1 to 4.

As described above, in the invention according to claim 1 or 5, the present invention attaches the tooth to the adapter projecting from the tip end side of the bucket of the excavator system excavator by a detachable mechanism, and the excavator system excavator. By operating the bucket of the above, various anti-soil work such as excavation work of ground and piping pits, peeling work of asphalt pavement layer, soil crushing work, soil leveling work, etc. will be performed by tooth. As the attachment / detachment mechanism, a fitting / removing portion is formed in the tooth, a pre-stop hole-shaped fitting / removing hole is formed in the fitting / removing portion, and a fitting / removing portion that can be fitted / removed in the fitting / removing hole is formed in the adapter. Protrusions are formed on both sides of the tooth, and the external force applied to the tooth is received by the fitting contact between the fitting / removing hole of the tooth and the fitting / removing part of the adapter. A retaining mechanism having a retaining member for preventing the tooth from coming off is provided, and the retaining member is formed with a loose fitting recess that can be fitted and removed from the protrusion of the adapter, and the loose fitting recess and the protrusion are contacted and locked. Since it is configured to prevent the tooth from coming off from the adapter, the external force applied to the tooth due to the above-mentioned soil-to-earth work can be received by the fitting contact between the fitting / removing hole of the tooth and the fitting / removing portion of the adapter. In addition, the loose fitting recess of the retaining member is abutted and locked to the protrusion of the adapter to prevent the tooth from coming off and coming off from the adapter, and various soil-to-earth operations can be reliably performed. The soil work efficiency can be improved, and the tooth can be easily replaced by releasing the contact locking of the retaining member with respect to the protrusion.

Further, in the invention according to claim 2, a male threaded portion is formed in the retaining member, a female threaded portion is formed in the fitting / detaching portion of the tooth, and the retaining member is toothed by the threaded structure of the male threaded portion and the female threaded portion. Since the retaining member is freely moved forward and backward, the retaining member is moved forward and backward via the screwing structure by the rotation and reverse rotation of the retaining member, and the retaining member comes into contact with the protrusion. By releasing the lock and engaging and disengaging, the tooth can be easily replaced and replaced, the efficiency of work with soil can be improved, and in the invention according to claim 3, the above-mentioned withdrawal can be performed. Since the member is arranged so as to be detachably detachable from the fitting / detaching portion of the tooth due to the screwing structure of the male screw portion and the female screw portion, the retaining member can be easily removed from the fitting / removing portion of the tooth, and the tooth can be easily removed. Replacement and replacement can be easily performed, work efficiency with soil can be improved, and in the invention according to claim 4, the protrusion is formed in a tapered conical trapezoidal shape, and the play is formed. Since the fitting recess is formed in a wide-opening shape that can be loosely fitted to the conical trapezoidal protrusion, the protrusion and the loose fitting recess can be easily fitted and removed, and the tooth can be easily replaced. Can be done.

It is a separation perspective view of the embodiment of this invention. It is a side sectional view of the embodiment of this invention. It is a right sectional view of the embodiment of this invention. It is a partial normal sectional view of the embodiment of this invention. It is a plan sectional view of the embodiment of this invention. It is a partial perspective view of the embodiment of this invention. It is a front view of the use state of the Example of Embodiment of this invention. It is a side view of the use state of the Example of Embodiment of this invention.

1 to 8 show an example of an embodiment of the present invention, where Q is an excavator-based excavator, 1 is a bucket, and as shown in FIGS. 1, 2, 2, 7, and 8, the bucket 1 Multiple adapters 2 ・ 2 ・ 2 ・ 2 are fixed in parallel on the tip side, in this case, a total of 4 adapters 2 ・ 2 ・ 2 ・ 2 In this case, a total of four types of the left-end tooth member 3L, two intermediate tooth members 3C / 3C having the same shape, and the right-end tooth member 3R having different shapes from each other are attached and detached by the attachment / detachment mechanism M toward the tip of the bucket 1. They are freely arranged in parallel.

In this case, as the attachment / detachment mechanism M, as shown in FIGS. 1, 2, 3, and 4, a fitting / removing portion 5 is formed in the tooth 3, and an excavation tip edge portion 4 is formed at the tip of the tooth 3. A blind hole-shaped fitting / removing hole 5a is formed in the fitting / removing portion 5, a fitting / removing rod portion 2a that can be fitted / removed in the fitting / removing hole 5a is formed in the fitting / removing hole 5a, and protrusions M are formed on both side surfaces of the adapter 2. _1. M ₁ is formed, and the external force applied to the tooth 3 is the fitting contact between the fitting / removing hole 5a of the tooth 3 and the fitting / removing rod portion 2a of the adapter 2, for example, the front stop bottom surface of the fitting / removing hole 5a and the fitting / removing rod. The structure is such that it is received by surface contact with the tip surface of the portion 2a and tapered surface contact between the inner peripheral surface of the hole of the fitting / removing hole 5a and the outer peripheral surface of the fitting / removing portion 2a. A retaining mechanism N / N having a retaining member 6/6 for preventing the tooth 3 from being detached from the adapter 2 is provided, and the retaining member 6/6 is a play that can be fitted / detached to the protrusions M1 _/ M1 of the adapter ₂ . Fitting recesses _N1 and N1 are formed, and the loose fitting recesses _N1 and _N1 are configured to prevent the tooth ₃ from coming off from the adapter ₂ by _abutting and locking the protrusions M1 and M1. There is.

In this case, as shown in FIGS. 1, 4, 5, and 6, male screw portions 6a and 6a and wrench holes L are formed in the retaining members 6 and 6, and the tooth 3 is fitted and detached on both sides of the fitting and removing portions 5. Female threaded portions 5b and 5b are formed so as to fit into the fitting and removing holes 5a in a direction orthogonal to the fitting and removing direction F of the fitting and removing rod portion 2a with respect to the hole 5a. Due to the structure and the seats W / W, the retaining members 6 and 6 are arranged in the fitting / removing portion 5 of the tooth 3 so as to be able to advance and retreat, and in this case, the retaining members 6 and 6 are arranged in the male screw portions 6a and 6a and the male screw portions 6a and 6a. The female threaded portions 5b and 5b are screwed together so that they can be detachably disengaged from the fitting and detaching portions 5 of the tooth ₃ , and in this case, the protruding portions M1 and M1 are formed in _a tapered conical trapezoidal shape. The free-fitting recesses N ₁ and N ₁ are formed in a wide-opening shape that can be loosely fitted to the conical trapezoidal protrusions M ₁ and M ₁ , and play with the tapered outer surfaces M ₂ and M ₂ of the protrusions M ₁ and M ₁ . _The tapered inner surfaces _N2 and _N2 of the fitting recesses _N1 and N1 are loosely fitted.

Since the example of this embodiment has the above configuration, as shown in FIGS. 1, 2, and 3, the tooth 3 is attached to the adapter 2 projecting from the tip end side of the bucket 1 of the excavator system excavator Q by the attachment / detachment mechanism M. Installation, as shown in FIG. 8, by operating the bucket 1 of the excavator system excavator Q, excavation work such as the ground G and the pit for piping by the front surface and the back surface of the excavation tip edge 4 and the tooth 3 of the tooth 3, and the asphalt pavement layer. Various anti-soil work such as peeling work, soil crushing work, and soil leveling work will be performed.

In this case, as the attachment / detachment mechanism M, as shown in FIGS. 1, 2, 3, and 4, a fitting / removing portion 5 is formed in the tooth 3, and an excavation tip edge portion 4 is formed at the tip of the tooth 3. A blind hole-shaped fitting / removing hole 5a is formed in the fitting / removing portion 5, a fitting / removing rod portion 2a that can be fitted / removed in the fitting / removing hole 5a is formed in the fitting / removing hole 5a, and protrusions M are formed on both side surfaces of the adapter 2. _1. M ₁ is formed, and the external force applied to the tooth 3 is the fitting contact between the fitting / removing hole 5a of the tooth 3 and the fitting / removing rod portion 2a of the adapter 2, for example, the front stop bottom surface of the fitting / removing hole 5a and the fitting / removing rod. The structure is such that it is received by surface contact with the tip surface of the portion 2a and tapered surface contact between the inner peripheral surface of the hole of the fitting / removing hole 5a and the outer peripheral surface of the fitting / removing portion 2a. A retaining mechanism N / N having a retaining member 6/6 for preventing the tooth 3 from being detached from the adapter 2 is provided, and the retaining member 6/6 is a play that can be fitted / detached to the protrusions M1 _/ M1 of the adapter ₂ . Fitting recesses _N1 and N1 are formed, and the loose fitting recesses _N1 and _N1 are configured to prevent the tooth ₃ from coming off from the adapter ₂ by _abutting and locking the protrusions M1 and M1. Therefore, the external force applied to the tooth 3 due to the soil-resistant work can be received by the fitting contact between the fitting / removing hole 5a of the tooth 3 and the fitting / removing rod portion 2a of the adapter 2, and the protrusion M of the adapter 2 can be received. By contacting and locking the loose fitting recesses N1 and N1 of the retaining members 6 and ₆ to ₁ and M1, it is possible to prevent the tooth 3 from coming off and detaching from the adapter ₂ and ensuring various soil _- to-earth work. It is possible to improve the efficiency of work with soil, and the tooth 3 can be replaced by releasing the contact locking of the retaining members ₆ and ₆ with respect to the protrusions M1 and M1. It can be done easily.

Further, in this case, as shown in FIGS. 1, 4, 5, and 6, male screw portions 6a and 6a are formed on the retaining members 6 and 6, and the fitting and removing holes 5a are formed on both sides of the fitting and removing portions 5 of the tooth 3. Female threaded portions 5b and 5b are formed to fit into the fitting and unscrewing holes 5a in a direction orthogonal to the fitting and unscrewing direction F of the fitting and unscrewing portion 2a. Since the retaining members 6 and 6 are freely arranged in the fitting / removing portion 5 of the tooth 3, the retaining member 6 is moved back and forth via the screwing structure by the rotation and reverse rotation of the retaining members 6 and 6. The tooth 3 can be easily replaced and replaced by releasing the contact locking of the retaining members ₆ and ₆ with respect to the protrusions M1 and M1 and engaging with the protrusions M1 and M1. In this case, as shown in FIGS. 1, 4, 5, and 6, the retaining members 6 and 6 are screwed together with the male threaded portions 6a and 6a and the female threaded portions 5b and 5b. Since it is arranged so as to be freely detachable from the fitting / removing portion 5 of the tooth 3, the retaining members 6 and 6 can be easily removed from the fitting / removing portion 5 of the tooth 3 and the tooth 3 can be easily replaced. In this case, as shown in FIGS. ₁ and 4, the protrusions M1 and M1 are formed in _a tapered conical trapezoidal shape, and the play is formed. Since the fitting recesses _N1 and _N1 are formed in _a wide opening shape that can be loosely fitted to the conical trapezoidal protrusions M1 and M1, the protrusions _M1 and _M2 are formed by the _respective tapered surfaces _N2 and M2. _The loose fitting recesses _N1 and N1 can be easily fitted and removed, and the tooth ₃ can be easily replaced and replaced.

The present invention is not limited to the above embodiment, and for example, the attachment / detachment mechanism M, the protrusion M1, the retaining mechanism N, the loose fitting recess N1, the bucket ₁ , the fitting _/ removing portion 2a, and the fitting / removing portion. 5. The structure, form, forming position, material, and the like of the fitting / removing hole 5a and the retaining member 6 are appropriately designed and changed.

As mentioned above, the intended purpose can be sufficiently achieved.

Q Excavator excavator M Detachment mechanism M ₁ Protrusion part N Detachment mechanism N ₁ Free fitting recess 1 Bucket 2 Adapter 2a Fitting / unfitting part 3 Tooth 5 Fitting / removing part 5a Fitting / removing hole 5b Female threaded part 6 Male threaded part

The present invention relates to a tooth attachment / detachment structure for a bucket used in an excavator-type excavator and a bucket thereof.

Conventionally, as this type of bucket tooth attachment / detachment structure and its bucket, a cast iron adapter is projected on the tip side of the bucket of an excavator system excavator, and the cast iron tooth is detachably projected onto the adapter by the attachment / detachment mechanism. As the attachment / detachment mechanism, a fitting / detaching portion is formed in the tooth, an excavation tip edge portion is formed in the tip portion of the tooth, and a blind hole-shaped fitting / removing hole is formed in the fitting / removing portion. A fitting / removing rod portion that can be fitted / removed is formed in the fitting / removing hole, a vertical square hole is formed in the above adapter and tooth, a fitting / removing rod portion is inserted in the fitting / removing hole, and a square elastic material is inserted in the vertical square hole. It is known that the adapter and the tooth are detachably configured by inserting and inserting the square pin into the vertical square hole and inserting and removing the square pin.

However, various anti-soil work such as excavation work of ground and piping pits, peeling work of asphalt pavement layer, soil crushing work, soil leveling work, etc. using the excavation tip edge of the tooth and the front and back surfaces of the tooth. The one with the structure to do is known.

Patent No. 6628080

However, in the case of the above-mentioned conventional structure, when excavation work or the like is performed using the excavation tip edge portion of the tooth, the front surface and the back surface of the tooth, hard soil, when the excavation tip edge portion of the tooth plate portion of each tooth is penetrated. It may collide with rocks, gravel, etc. and apply an impact force more than expected, and due to such harsh soil work, the square pin of the attachment / detachment mechanism between each tooth and each adapter may be damaged. There is a possibility that the tooth will come off from the adapter due to such a failure of the attachment / detachment mechanism, and it will be difficult to work with soil due to the tooth coming off, which may reduce the workability with soil, and it may be lost due to the tooth coming off. This has the inconvenience that a new tooth is required and the economic efficiency may be reduced.

The present invention is intended to solve these inconveniences, and in the invention of claim 1, an adapter is projected from the tip end side of a bucket of an excavator-based excavator, and the adapter is provided. The tooth is detachably projected by the attachment / detachment mechanism, and as the attachment / detachment mechanism, a fitting / detaching portion is formed in the tooth, and a blind hole-shaped fitting / removing hole is formed in the fitting / removing portion. A fitting / removing rod that can be fitted / removed is formed in the fitting / removing hole, tapered conical trapezoidal protrusions are formed on both side surfaces of the adapter, and the external force applied to the tooth is the fitting / removing hole of the tooth and the adapter. The structure is such that it is received by fitting contact with the fitting / removing portion, and a retaining mechanism having a retaining member for preventing the tooth from detaching from the adapter is provided on both sides of the fitting / detaching portion of the tooth. A male screw portion is formed on the retaining member, a female screw portion is formed on the fitting / detaching portion of the tooth, and the retaining member is freely arranged in the fitting / removing portion of the tooth due to the screwing structure of the male screw portion and the female screw portion. Then , in the retaining member, a play-fitting recess having a wide-opening shape that can be loosely fitted and removed is formed in the tapered conical trapezoidal protrusion of the adapter, and the wide-opening-shaped loose fitting recess and the tapered conical trapezoidal shape are formed. The bucket tooth attachment / detachment structure is configured to prevent the tooth from detaching from the adapter by engaging with each other by loosely fitting with the protrusion.

The invention according to claim 2 is characterized in that the retaining member is arranged so as to be removably detachable from the fitting / detaching portion of the tooth due to the screwing structure of the male screw portion and the female screw portion.

Further, the invention according to claim 3 is in a bucket comprising the bucket tooth attachment / detachment structure according to claim 1 or 2 .

As described above, in the invention according to claim 1 or 3 , the present invention attaches a tooth to an adapter projecting from the tip end side of the bucket of the excavator system excavator by a detachable mechanism, and the excavator system excavator. By operating the bucket of the above, various anti-soil work such as excavation work of the ground and piping pits, peeling work of asphalt pavement layer, soil crushing work, soil leveling work, etc. will be performed by tooth. As the attachment / detachment mechanism, a fitting / removing portion is formed in the tooth, a pre-stop hole-shaped fitting / removing hole is formed in the fitting / removing portion, and a fitting / removing portion that can be fitted / removed in the fitting / removing hole is formed in the adapter. Tapered conical trapezoidal protrusions are formed on both sides of the soil, and the external force applied to the tooth is received by the fitting contact between the fitting / removing hole of the tooth and the fitting / removing part of the adapter. A retaining mechanism having a retaining member for preventing the tooth from coming off from the adapter is provided on both sides of the tool, a male threaded portion is formed on the retaining member of the retaining mechanism, a female threaded portion is formed on the fitting / detaching portion of the tooth, and the male threaded portion is formed. In addition, the retaining member is freely advancing and retreating to the fitting / detaching portion of the tooth due to the screwing structure of the female threaded portion, and the retaining member has an open- opening-shaped loose fitting that can be loosely fitted / detached to the tapered conical trapezoidal protrusion of the adapter. This is because a recess is formed, and the loose fitting recess having a wide opening shape and the protruding portion having a tapered conical trapezoidal shape are loosely fitted to each other to prevent the tooth from coming off from the adapter. The external force applied to the tooth due to the soil-resistant work can be received by the fitting contact between the fitting / removing hole of the tooth and the fitting / removing portion of the adapter, and the loose fitting recess of the retaining member hits the protrusion of the adapter. By contacting and locking, it is possible to prevent the tooth from coming off from the adapter, it is possible to reliably perform various soil-resistant work, it is possible to improve the soil-resistant work efficiency, and a retaining member for the above-mentioned protrusion. By releasing the contact locking of the soil, the tooth can be easily replaced and replaced, and the retaining member is moved forward and backward via the screwing structure by the rotation and reverse rotation of the retaining member, and the protrusion By releasing the contact locking of the retaining member and disengaging it, the tooth can be easily replaced and replaced, the efficiency of soil work can be improved, and the shape of the tapered conical table can be improved. It is possible to easily insert and remove the protrusion and the wide-opening loose fitting recess, and it is possible to easily replace and replace the tooth.

Further, in the invention according to claim 2 , since the retaining member is disposed so as to be detachable from the fitting / detaching portion of the tooth due to the screwing structure of the male screw portion and the female screw portion, the retaining member is used. It can be easily removed from the fitting / removing portion of the tooth, the tooth can be easily replaced and replaced, and the efficiency of work with soil can be improved.

It is a separation perspective view of the embodiment of this invention. It is a side sectional view of the embodiment of this invention. It is a right sectional view of the embodiment of this invention. It is a partial normal sectional view of the embodiment of this invention. It is a plan sectional view of the embodiment of this invention. It is a partial perspective view of the embodiment of this invention. It is a front view of the use state of the Example of Embodiment of this invention. It is a side view of the use state of the Example of Embodiment of this invention.

1 to 8 show an example of an embodiment of the present invention, where Q is an excavator-based excavator, 1 is a bucket, and as shown in FIGS. 1, 2, 2, 7, and 8, the bucket 1 Multiple adapters 2 ・ 2 ・ 2 ・ 2 are fixed in parallel on the tip side, in this case, a total of 4 adapters 2 ・ 2 ・ 2 ・ 2 In this case, a total of four types of the left-end tooth member 3L, two intermediate tooth members 3C / 3C having the same shape, and the right-end tooth member 3R having different shapes from each other are attached and detached by the attachment / detachment mechanism M toward the tip of the bucket 1. They are freely arranged in parallel.

In this case, as the attachment / detachment mechanism M, as shown in FIGS. 1, 2, 3, and 4, a fitting / removing portion 5 is formed in the tooth 3, and an excavation tip edge portion 4 is formed at the tip of the tooth 3. A blind hole-shaped fitting / removing hole 5a is formed in the fitting / removing portion 5, a fitting / removing rod portion 2a that can be fitted / removed in the fitting / removing hole 5a is formed in the fitting / removing hole 5a, and protrusions M are formed on both side surfaces of the adapter 2. _1. M ₁ is formed, and the external force applied to the tooth 3 is the fitting contact between the fitting / removing hole 5a of the tooth 3 and the fitting / removing rod portion 2a of the adapter 2, for example, the front stop bottom surface of the fitting / removing hole 5a and the fitting / removing rod. The structure is such that it is received by surface contact with the tip surface of the portion 2a and tapered surface contact between the inner peripheral surface of the hole of the fitting / removing hole 5a and the outer peripheral surface of the fitting / removing portion 2a. A retaining mechanism NN having a retaining member 6 or 6 for preventing the tooth 3 from being detached from the adapter 2 is provided, and the retaining member 6 or 6 is provided with _a tapered conical trapezoidal protrusion M1 or M1 of the adapter ₂ . Wide-opening _- shaped loose _- fitting recesses N1 and N1 that can be loosely fitted and removed are formed in the above _- mentioned wide _- opening _- shaped loose _- fitting recesses N1 and N1 and tapered conical trapezoidal protrusions M1 and M1. It is configured to prevent the tooth 3 from coming off from the adapter 2 by locking each other in contact with each other by loose fitting.

In this case, as shown in FIGS. 1, 4, 5, and 6, male screw portions 6a and 6a and wrench holes L are formed in the retaining members 6 and 6, and the tooth 3 is fitted and detached on both sides of the fitting and removing portions 5. Female threaded portions 5b and 5b are formed so as to fit into the fitting and removing holes 5a in a direction orthogonal to the fitting and removing direction F of the fitting and removing rod portion 2a with respect to the hole 5a. Due to the structure and the seats W / W, the retaining members 6 and 6 are arranged in the fitting / removing portion 5 of the tooth 3 so as to be able to advance and retreat, and in this case, the retaining members 6 and 6 are arranged in the male screw portions 6a and 6a and the male screw portions 6a and 6a. The female threaded portions 5b and 5b are screwed together so that they can be detachably disengaged from the fitting and detaching portions 5 of the tooth ₃ , and in this case, the protruding portions M1 and M1 are formed in _a tapered conical trapezoidal shape. The loose fitting recesses N ₁ and N ₁ are formed in a wide opening shape that can be loosely fitted to the tapered conical trapezoidal protrusions M ₁ and M ₁ , and the tapered outer surfaces M ₂ and M ₂ of the protrusions M ₁ and M ₁ are formed. And the tapered inner surfaces _N2 and _N2 of the _loose fitting recesses _N1 and N1 are loosely fitted.

Since the example of this embodiment has the above configuration, as shown in FIGS. 1, 2, and 3, the tooth 3 is attached to the adapter 2 projecting from the tip end side of the bucket 1 of the excavator system excavator Q by the attachment / detachment mechanism M. Installation, as shown in FIG. 8, by operating the bucket 1 of the excavator system excavator Q, excavation work such as the ground G and the pit for piping by the front surface and the back surface of the excavation tip edge 4 and the tooth 3 of the tooth 3, and the asphalt pavement layer. Various anti-soil work such as peeling work, soil crushing work, and soil leveling work will be performed.

In this case, as the attachment / detachment mechanism M, as shown in FIGS. 1, 2, 3, and 4, a fitting / removing portion 5 is formed in the tooth 3, and an excavation tip edge portion 4 is formed at the tip of the tooth 3. A blind hole-shaped fitting / removing hole 5a is formed in the fitting / removing portion 5, a fitting / removing rod portion 2a that can be fitted / removed in the fitting / removing hole 5a is formed in the fitting / removing hole 5a, and tapered cones are formed on both side surfaces of the adapter 2. The trapezoidal protrusions M ₁ and M ₁ are formed, and the external force applied to the tooth 3 is the fitting contact between the fitting / removing hole 5a of the tooth 3 and the fitting / removing hole 2a of the adapter 2, for example, the tip of the fitting / removing hole 5a. The structure is such that it is received by surface contact between the bottom of the stop and the tip surface of the fitting / removing rod 2a, or by contact between the inner peripheral surface of the hole of the fitting / removing hole 5a and the outer peripheral surface of the fitting / removing rod 2a, and the tooth 3 is fitted / removed. A retaining mechanism NN having a retaining member 6 or 6 for preventing the tooth 3 from being detached from the adapter 2 is provided on both sides of the portion 5, and the retaining member 6 or 6 is provided with a tapered conical trapezoidal protrusion of the adapter 2. Wide _- opening _- shaped loose _- fitting recesses N1 and N1 that can be loosely fitted and removed are formed in the portions M1 and M1, and the wide _- opening _- shaped loose _- fitting recesses N1 and N1 and the tapered conical trapezoidal protrusion M are formed. _1. Since it is configured to prevent the tooth 3 from coming off from the adapter 2 by engaging with each other by loose fitting with the M ₁ , the external force applied to the tooth 3 due to the soil-resistant work is applied to the tooth 3. It can be received by the fitting contact between the fitting / removing hole 5a and the fitting / removing rod portion 2a of the adapter 2, and the loose fitting recess N1 ・ of the retaining member ₆・₆ is formed in the protrusions M1 and M1 of the adapter ₂ . By abutting and locking the N ₁ , it is possible to prevent the tooth 3 from coming off and detaching from the adapter 2, it is possible to reliably perform various soil-to-earth work, and it is possible to improve the soil-to-earth work efficiency. By releasing the contact locking of the retaining members 6 and 6 with respect to the protrusions M ₁ and M ₁ , the tooth 3 can be easily replaced and replaced , and further, FIGS. 1, 4, and 5 As shown in FIG. 6, male screw portions 6a and 6a are formed on the retaining members 6 and 6, and are orthogonal to the fitting and detaching direction F of the fitting and detaching portions 2a with respect to the fitting and removing holes 5a on both sides of the fitting and removing portions 5 of the tooth 3. The female threaded portions 5b and 5b that are fitted into the fitting and removing holes 5a are formed, and the retaining members 6 and 6 are fitted and removed from the tooth 3 by the screwing structure of the male threaded portions 6a and 6a and the female threaded portions 5b and 5b. Since the retaining member 6 is freely moved forward and backward, the retaining member 6 is moved forward and backward via the screwing structure by the rotation and reverse rotation of the retaining member 6 and 6 with respect to the protrusions _{M1 and} M1 . By releasing the contact locking of the retaining members 6 and 6 and engaging and disengaging, the tooth 3 can be easily replaced. It is possible to improve the efficiency of soil work .

Further, in this case , as shown in FIGS. 1, 4, 5, and 6, the tooth 3 is fitted and detached from the retaining members 6 and 6 by the screwing structure of the male screw portions 6a and 6a and the female screw portions 5b and 5b. Since the retaining members 6 and 6 are arranged so as to be detachable from the portion 5, the retaining members 6 and 6 can be easily removed from the fitting / removing portion 5 of the tooth 3, and the tooth 3 can be easily replaced. The soil work efficiency can be improved, and in this case, as shown in FIGS. 1 and 4, the protrusions M ₁ and M ₁ are formed in a tapered conical trapezoidal shape, and the free fitting recesses N ₁ and N ₁ are formed. Is formed into _a wide _- opening shape that can be loosely fitted to the tapered conical trapezoidal protrusions M1 and M1, so that the tapered surfaces _N2 and M2 are _{loosely fitted} to the protrusions _M1 and M1. _The recesses N1 and N1 can be easily fitted and removed, and the tooth ₃ can be easily replaced and replaced.

The present invention is not limited to the above embodiment, and for example, the attachment / detachment mechanism M, the protrusion M1, the retaining mechanism N, the loose fitting recess N1, the bucket ₁ , the fitting _/ removing portion 2a, and the fitting / removing portion. 5. The structure, form, forming position, material, and the like of the fitting / removing hole 5a and the retaining member 6 are appropriately designed and changed.

As mentioned above, the intended purpose can be sufficiently achieved.

Q Excavator excavator M Detachment mechanism M ₁ Protrusion part N Detachment mechanism N ₁ Free fitting recess 1 Bucket 2 Adapter 2a Fitting / unfitting part 3 Tooth 5 Fitting / removing part 5a Fitting / removing hole 5b Female threaded part 6 Male threaded part

Claims (5)

An adapter is projected from the tip end side of the bucket of the excavator system excavator, and the tooth is detachably projected from the adapter by a detachable mechanism. As the detachable mechanism, a fitting / detaching portion is formed on the tooth. A blind hole-shaped fitting / removing hole is formed in the fitting / removing portion, a fitting / removing rod portion that can be fitted / removed in the fitting / removing hole is formed in the adapter, and protrusions are formed on both side surfaces of the adapter. The external force applied to the tooth is received by the fitting contact between the fitting / removing hole of the tooth and the fitting / removing portion of the adapter. A retaining mechanism having a member is provided, and a loose fitting recess that can be fitted and removed from the protrusion of the adapter is formed in the retaining member, and the loose fitting recess and the protrusion are contact-locked to the adapter from the adapter. A tooth attachment / detachment structure for buckets, which is characterized by being configured to prevent the tooth from coming off. A male threaded portion is formed on the retaining member, a female threaded portion is formed on the fitting / removing portion of the tooth, and the retaining member is freely arranged in the fitting / removing portion of the tooth due to the screwing structure of the male threaded portion and the female threaded portion. The tooth attachment / detachment structure for a bucket according to claim 1, wherein the structure is made of. The tooth attachment / detachment structure for a bucket according to claim 2, wherein the retaining member is disposed so as to be detachable from the fitting / detaching portion of the tooth by the screwing structure of the male thread portion and the female thread portion. 3. The tooth attachment / detachment structure for a bucket according to any one item. A bucket comprising the tooth attachment / detachment structure for a bucket according to any one of claims 1 to 4.

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