JP4688948B2 - Tooth member fixing device for bucket for excavator machine - Google Patents

Description

  The present invention relates to a tooth member fixing device for a bucket for a shovel machine, and in particular, an adapter member having a lock through hole and an engagement convex portion, a lock through hole, and an engagement concave portion communicating with the engagement convex portion. A tooth member that is detachably attached to the adapter member, a piece member that is housed in the locking through hole of the engaging convex portion, and an adapter that is inserted into the communicating locking through hole. The present invention relates to a tooth member fixing device for a bucket for a shovel machine provided with a locking member for fixing to a member.

  FIG. 6 shows a bucket body for an excavator machine. A plurality of adapter members 102 are fixed to the bucket body 100 for the shovel machine by welding at the edge 130 of the bucket body 100 for the shovel machine. A tooth member 103 is removably attached to the adapter member 102 at the distal end of the adapter member 102.

  FIG. 7 shows a conventional tooth member fixing device for a bucket for an excavator machine. A tooth member fixing device 110 for a shovel machine bucket includes an adapter member 102 having a locking through hole 106 b and an engaging convex portion 105, an engaging concave portion 104 communicating with the locking through hole 106 a and the engaging convex portion 105. A tooth member 103 that is detachably attached to the adapter member 102, a piece member 107 that is housed in the lock through hole 6b of the engaging convex portion 105, and the lock through holes 6a and 6b that are communicated with each other. And a locking member 108 inserted into the. After the engaging convex portion 105 of the adapter member 102 and the engaging concave portion 104 of the tooth member 103 are communicated with each other and the piece member 107 is installed, the locking member 108 is driven and inserted, so that the tooth member 103 is inserted. It is fixed to the adapter member 102.

  FIG. 8 shows a piece member 107 of a conventional tooth member fixing device for a bucket for a shovel machine. Three rollers 132a, 132b, and 132c are embedded in the piece member main body 131. These rollers 132 are formed in a cylindrical shape, and a substantially one third portion along a direction orthogonal to the axial direction of the rollers 132 is exposed to the outside from the upper surface of the piece member main body 131. A through hole 133 is provided at the axial center position of the roller 132, and an elastic resin material constituting the piece member main body 131 enters the inside thereof. The piece member main body 131 and the roller 132 are integrated by bringing the elastic resin material into the through-hole 133 and solidifying it, and the outer peripheral surface of the roller 132 and the elastic resin material are intimately solidified. Thereby, when the locking member 108 is driven, the piece member 107 reduces the frictional resistance with the locking member 108 by the roller 132 and holds the position of the roller 132 by the restoring force of the elastic resin material.

  On the other hand, Patent Document 1 discloses a tooth member fixing device for a bucket for an excavator machine. Here, the piece member is composed of a piece member main body made of an elastic resin material and a single leaf spring member embedded and integrated with a part of the piece member main body exposed.

Utility Model Registration No. 3149552

  In a conventional tooth member fixing device for a bucket for a shovel machine, the roller is peeled off from the piece member main body when the lock member is driven even if the piece member main body made of an elastic resin and the roller are closely integrated. There was a fear. This is because the roller is not sufficiently fixed to the elastic resin material, so that it is tilted by the lock member to be pushed in, and stress acts in the direction in which the roller is peeled off from the piece member main body.

  For this reason, in the conventional tooth member fixing device for a bucket for a shovel machine, the locking member must be driven with an excessive impact force, which promotes deterioration of the elastic resin material and causes the tooth member to fall. It was.

  An object of the present application is to provide a tooth member fixing device for a bucket for a shovel machine that solves such a problem and prevents a lock member from being easily inserted and dropped.

To achieve the above object, a tooth member fixing device for a bucket for an excavator machine according to the present invention includes an adapter member having a lock through hole and an engagement projection, a lock through hole, and an engagement projection. A tooth member that is detachably attached to the adapter member, a piece member that is housed in the lock through hole of the engagement convex portion, and a lock through hole that is communicated with the tooth member. In the tooth member fixing device for a shovel machine bucket, the lock member for fixing the tooth member to the adapter member, the piece member is integrally embedded in the piece member main body made of an elastic resin material and the piece member main body. The leaf spring member is provided on a surface facing the lock member, and covers the elastic resin material of the piece member main body from the top surface, and the piece member main body from both ends of the bending portion. Tilt inward Both ends extend linearly to the vicinity of the outlet of the buffer hole at the outermost end on each side and are fixed to the elastic resin material of the piece member body, and the elastic resin material of the side piece member body is elastic when the lock member enters. A fixing portion that is deformed and receives a restoring force, and on the piece member main body, on the side opposite to the curved portion of the leaf spring member, the surrounding elastic resin material compressed when the lock member enters is released into the gap. A plurality of buffer holes, which are cylindrical holes, are provided toward the curved portion of the leaf spring member .

With the above-described configuration, the tooth member fixing device for the shovel machine bucket includes a bending portion in which the piece member reduces frictional resistance with the lock member, and a fixing portion in which the elastic member material of the piece member body is fixed from both ends of the bending portion. The fixing portion is fixed to the inner side of the piece member main body so as to be integrated with the elastic resin material. The lock member can be smoothly inserted by the combination of the curved portion and the fixing portion. Moreover, when the elastic resin material of a piece member main body is compressed by this, escape of an elastic resin material is securable.

  Further, in the tooth member fixing device for a bucket for a shovel machine, it is preferable that the curved portion of the leaf spring member has a curved corrugated shape, and the portion continuous with the fixing portion moves in a curved line. Thereby, the frictional resistance with the lock member can be reduced, and stress concentration at the continuous point between the curved portion and the fixing portion can be avoided.

  Furthermore, in the tooth member fixing device for a bucket for a shovel machine, a corrugated protrusion that matches the curved corrugated shape of the curved portion may be provided on the surface of the lock member that faces the curved portion of the leaf spring member. preferable. Thereby, the lock member and the curved portion of the leaf spring member can be engaged with each other, and the lock member can be prevented from falling off.

  As described above, according to the tooth member fixing device for a shovel machine bucket according to the present invention, it is possible to provide a tooth member fixing device for a shovel machine bucket that can be easily inserted and prevented from falling off. it can.

It is sectional drawing which shows schematic structure of one Embodiment of the tooth member fixing device of the bucket for shovel machines which concerns on this invention. It is sectional drawing which expanded and showed the piece member. It is a perspective view which expands and shows the whole piece member. It is sectional drawing which shows the shape of a locking member. It is explanatory drawing which shows operation | movement of the piece member when a locking member is pushed in. It is a perspective view which shows the bucket main body for shovel machines. It is a perspective view which shows the tooth member fixing device of the bucket for conventional shovel machines. It is sectional drawing which shows the piece member of the tooth member fixing device of the bucket for conventional shovel machines.

  Hereinafter, embodiments of a tooth member fixing device for a shovel machine bucket according to the present invention will be described in detail with reference to the drawings. In FIG. 1, schematic structure of one Embodiment of the tooth member fixing device of the bucket for shovel machines which concerns on this invention is shown. A tooth member fixing device 1 for a shovel machine bucket includes an adapter member 2 and a tooth member 3, and the tooth member 3 is detachably attached to the adapter member 2.

  The adapter member 2 has an engagement convex portion 5 and a lock through hole 6a. On the other hand, the tooth member 3 has an engagement recess 4 and a lock through hole 6b. The lock through hole 6 a of the adapter member 2 and the lock through hole 6 b of the tooth member 3 communicate with each other when the engaging convex portion 5 of the adapter member 2 is inserted into the engaging concave portion 4 of the tooth member 3. There is a relationship. The piece member 7 is disposed in advance in the engaging recess 4 of the tooth member 3 facing the locking through hole 6a. The lock member 8 is inserted into the communicating lock through holes 6 a and 6 b to fix the tooth member 3 to the adapter member 2.

  FIG. 2 is a perspective view showing the entire piece member 7. 3A shows a cross-sectional view taken along the line AA in FIG. 2, and FIG. 3B shows a cross-sectional view taken along the line BB in FIG. The piece member 7 includes a piece member main body 9 made of an elastic resin material and a single leaf spring member 10 embedded in the piece member main body 9 integrally. The leaf spring member 10 includes a curved portion 11 provided on a surface facing the lock member 8, and a fixing portion 12 that is fixed by inclining from both ends of the curved portion 11 to the inside of the piece member main body 9. The That is, as shown in FIGS. 3A and 3B, the piece member main body 9 has a piece member projecting portion 15 having a curved corrugated shape on the surface that contacts the lock member 8. Moreover, as shown in FIG.3 (b), the front-end | tip part is round on the opposite side to the curved part 11 of the leaf | plate spring member 10 of the piece member main body 9. FIG. In the present embodiment, three cylindrical buffer holes 13 are provided toward the curved portion 11 of the leaf spring member 10.

  FIG. 4 shows a cross section of the lock member 8. The lock member 8 is provided with a corrugated lock member protrusion 14 on the surface of the leaf spring member 10 facing the curved portion 11. The lock member protrusion 14 is adapted to the curved piece member protrusion 15 of the bending portion 11. That is, as shown in FIG. 1, the lock member protrusion 14 of the lock member 8 and the piece member protrusion 15 of the curved portion 11 of the leaf spring member 10 are engaged with each other to prevent the lock member 8 from falling off. it can. Moreover, the lock member 8 has the lock member inclination part 17 for making the lock member 8 approach easily in the right and left. Further, the lock member 8 has a lock member curved portion 16 that is recessed in an arch shape on the opposite side to the lock member protruding portion 14.

  FIG. 5 shows the operation of the piece member 7 when the lock member 8 is pushed into the lock through holes 6a and 6b. The XY coordinates are shown in FIG. The lock member 8 enters in the direction of the arrow in FIG. 5, and the lock member inclined portion 17 of the lock member 8 contacts the curved portion 11 of the leaf spring member 10. The lock member 8 generates a stress (F) with respect to the piece member 7 due to the pushing force. This stress (F) can be decomposed into Fx which is an X direction component and Fy which is a Y direction component.

  In the piece member 7, the piece member main body 9 made of an elastic resin material is elastically deformed below the Y axis with respect to the stress component Fy generated by the lock member 8 entering. At this time, the elastic resin material of the piece member main body 9 around the buffer hole 13 is compressed and escapes into the gap of the buffer hole 13. Thereby, the elastic deformation to the Y direction of the piece member main body 9 is accelerated | stimulated. The elastic deformation of the piece member main body 9 in the Y direction is an overall elastic deformation because the upper surface of the piece member main body 9 is covered with the curved portion 11 of the plate spring member 10, and the plate spring member 10 is partially deformed. Stress concentration does not occur. When the lock member protrusion 14 of the lock member 8 passes, the piece member protrusion 15 returns to the upper side of the Y axis due to the restoring force of the elastic resin material.

  The stress component Fx generated by the entry of the lock member 8 is mainly resisted by the two fixing portions 12a and 12b. Then, the piece member main body 9 made of an elastic resin material on the side surfaces of the fixing portions 12a and 12b is elastically deformed. The restoring force of the piece member main body 9 on the side surfaces of the fixing portions 12a and 12b becomes a force for sliding the lock member 8 in the entering direction. Further, since the fixing portions 12 a and 12 b are connected to each other by the curved portion 11 of the leaf spring member 10, no partial stress concentration occurs in the leaf spring member 10.

  Then, the lock member inclined portion 17 of the lock member 8 is brought into point contact with the curved portion 11 of the leaf spring member 10, whereby the frictional resistance is reduced, and the lock member 8 can easily enter in the direction of the arrow in the figure. . After the first contact point with the leaf spring member 10 is exceeded, the lock member 8 is thereafter inserted by the wave-shaped curved surfaces of the lock member protrusion 14 and the piece member protrusion 15 being engaged with each other.

  Further, the leaf spring member 10 of the piece member 7 draws a curve in the fixing unit 12 by making use of the characteristic of the shape of the bending unit 11 that is a curved wave shape, so that the bending unit 11, the fixing unit 12, The stress concentration generated at the joint point is reduced. Thereby, peeling with the leaf | plate spring member 10 and elastic resin material which arises by stress concentration can be prevented.

  The leaf spring member 10 of the piece member 7 according to the present invention efficiently transmits the stress components Fx and Fy generated by the entry of the lock member 8 to the piece member body 9 and causes the piece member body 9 to be elastically deformed. The locking member 8 can be easily entered by the restoring force of the piece member main body 9. The stress concentration generated in the leaf spring member 10 is reduced by making the fixing unit 12 draw a curve by making use of the characteristic of the shape of the curved portion 11 which is a curved wave shape. And stability of the piece member 7 by pushing in the lock member 8 can be improved, and the lock member 8 can be inserted easily.

  1 Tooth member fixing device for bucket for excavator machine, 2,102 adapter member, 3,103 tooth member, 4,104 engagement recess, 5,105 engagement projection, 6a, 6b, 106a, 106b lock through hole, 7,107 piece member, 8,108 lock member, 9,131 piece member main body, 10 leaf spring member, 11 bending portion, 12 fixing portion, 13 buffer hole, 14 lock member protruding portion, 15 piece member protruding portion, 16 lock Member curved part, 17 Lock member inclined part, 100 bucket body for excavator machine, 130 edge part, 132 roller, 133 through-hole.

Claims (3)

An adapter member having a through hole for locking and an engaging convex portion; a tooth member having a through hole for locking; and an engaging concave portion communicating with the engaging convex portion and detachably attached to the adapter member; A tooth member for a bucket for a shovel machine, comprising: a piece member housed in a lock through hole of the joint convex portion; and a lock member that is inserted into the communicating lock through hole and fixes the tooth member to the adapter member. In the fixing device,
The piece member is composed of a piece member main body made of an elastic resin material, and a single leaf spring member integrally embedded in the piece member main body.
The leaf spring member is provided on the surface facing the lock member, and covers the elastic resin material of the piece member main body from the upper surface, and is inclined from both ends of the curved portion to the inside of the piece member main body. A straight line extending to the vicinity of the exit of the buffer hole at the outermost end and fixed to the elastic resin material of the piece member main body, and a fixing member that receives a restoring force by elastically deforming the elastic resin material of the side piece member body when the lock member enters and parts, is composed of,
On the opposite side of the curved portion of the leaf spring member, the piece member main body has a buffering hole, which is a cylindrical hole that allows the surrounding elastic resin material compressed when the lock member enters to escape into the gap. A device for fixing a tooth member for a bucket for an excavator machine, wherein a plurality of the members are provided toward the side .   The tooth member fixing device for a bucket for a shovel machine according to claim 1, wherein the curved portion of the leaf spring member has a curved corrugated shape, and a portion continuous with the fixing portion moves in a curved line. A tooth member fixing device for a bucket for a shovel machine.   The tooth member fixing device for a shovel machine bucket according to claim 2, wherein a corrugated protrusion adapted to the curved corrugated shape of the curved portion is provided on a surface of the lock member facing the curved portion of the leaf spring member. A tooth member fixing device for a bucket for an excavator machine, wherein a portion is provided.

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