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CN-122013846-A - Excavator bucket tooth

CN122013846ACN 122013846 ACN122013846 ACN 122013846ACN-122013846-A

Abstract

The invention provides an excavator bucket tooth, and belongs to the technical field of machinery. The tooth socket comprises a tooth socket body, wherein an inserting convex part is arranged on the tooth socket body, at least two symmetrically arranged abutting surfaces are arranged on the outer side wall of the inserting convex part, planes where the abutting surfaces are located are parallel to each other, an inserting cavity is formed in the tooth socket body, at least two abutting surfaces are arranged on the inner cavity wall of the inserting cavity, and when the inserting convex part is inserted into the inserting cavity, the abutting surfaces are in abutting or clearance fit with the corresponding abutting surfaces. The method has the advantages that the dimensional tolerance of the parallel planes is very easy to control and detect in the machining process. By strictly controlling the width of the inserting convex part and the inner width of the inserting cavity, the fit clearance between the bucket tooth main body and the tooth seat can be kept in a smaller preset range, and the too large or too small clearance caused by machining errors is avoided. When the excavator performs high-strength excavating operation, the bucket teeth are subjected to severe impact and alternating load.

Inventors

  • ZHANG LING
  • LI XUEYI

Assignees

  • 灵峰矿山机械(象山)有限公司

Dates

Publication Date
20260512
Application Date
20260316

Claims (10)

  1. 1. An excavator tooth, comprising: The tooth holder is provided with an inserting convex part, the outer side wall of the inserting convex part is at least provided with two symmetrically arranged abutting surfaces, and planes of the abutting surfaces are parallel to each other; the bucket tooth main body is internally provided with an inserting cavity, and the inner cavity wall of the inserting cavity is at least provided with two butt joint surfaces; when the inserting convex part is inserted into the inserting cavity, the abutting surface abuts against or is in clearance fit with the corresponding abutting surface.
  2. 2. The excavator tooth of claim 1 wherein the abutment surfaces are connected in sequence end to form an annular surface.
  3. 3. The excavator tooth of claim 1 wherein the cross section of the spigot projection tapers inwardly in the direction of spigot engagement of the tooth socket, the abutment surfaces being provided on the spigot projection at an end thereof adjacent the tooth socket and at an end thereof remote from the tooth socket respectively.
  4. 4. The excavator tooth of claim 1 wherein one of the socket projection and socket cavity is provided with a limit recess and the other is provided with a limit projection, the limit recess being capable of being fixed in socket engagement with the limit projection.
  5. 5. The excavator bucket tooth according to claim 1, wherein the insertion convex portion is provided with an insertion groove, the bucket tooth is provided with a through locking hole, the insertion groove is internally provided with a bolt in a detachable mode, when the bolt is fixed in the insertion groove, the end portion of the bolt stretches into the locking hole, the side face of the bolt is provided with a movable abutting portion, a deformation piece capable of deforming is arranged between the movable abutting portion and the bolt, and when the bolt is fixed in the insertion groove, the movable abutting portion abuts against the wall of the locking hole.
  6. 6. The excavator tooth of claim 5 wherein the end of the pin is provided with a lock which includes a first operative position and a second operative position, the lock being located in an axially projecting region of the pin end when the lock is in the first operative position and at least part of the lock being located in the axially projecting region of the pin end when the lock is in the second operative position and being in abutment with the spigot projection or tooth body.
  7. 7. The excavator tooth of claim 6 wherein the further the movable abutment is from the lock, the further the outer side of the movable abutment is from the pin axis.
  8. 8. The excavator tooth of claim 6 wherein the pin is provided with a mounting hole, a locating pin is provided in the mounting hole, a locating post is fixedly provided on the locking portion, the locating post is inserted in the mounting hole and can rotate relative to the mounting hole, at least two locating holes are provided on the outer peripheral surface of the locating post at intervals, and the locating pin is inserted in one of the locating holes.
  9. 9. The excavator tooth of claim 8 wherein the outer peripheral surface of the stop post is provided with a stop ring groove, the mounting hole is internally fixed with a locating pin, and the end of the locating pin is located in the stop ring groove.
  10. 10. The excavator bucket tooth of claim 1 wherein the socket is provided with a slot on the spigot projection, the bucket tooth is provided with a through locking hole, a plug pin is detachably arranged in the spigot, at least one side outer peripheral surface of the plug pin is a conical surface, a locking gasket is detachably arranged at the small diameter end of the plug pin, and when the plug pin is fixed in the slot, the locking gasket is abutted against the spigot projection or the bucket tooth body.

Description

Excavator bucket tooth Technical Field The invention belongs to the technical field of machinery, and particularly relates to an excavator bucket tooth. Background The existing excavator bucket tooth is usually in plug-in fit with the bucket tooth main body through a connection mode that the tooth holder is fixed through a transverse locking pin. However, in the conventional structure, the insertion convex portion of the tooth holder and the insertion cavity of the tooth body are mostly matched by adopting an arc surface or a conical surface. The coaxiality and the diameter tolerance of the curved surface or the conical surface are difficult to accurately control in machining, and irregular gaps are easily formed after the curved surface or the conical surface is assembled due to casting or forging errors. In high-strength excavation operations, severe impact loads and alternating stresses can cause the tooth body to oscillate, rotate and deflect in multiple degrees of freedom on the tooth holder. Because the arc surface lacks effective geometric constraint in tangential direction, the relative motion of the micro-amplitude high frequency not only can generate noise, but also can accelerate the abrasion of the matching surface, so that the gap is further enlarged, and a vicious circle is formed. More serious, the looseness of the matching surface enables huge shearing force and bending moment not to be effectively transmitted through the matching surface, but the huge shearing force and bending moment are intensively acted on the locking pin, so that the locking pin is subjected to fatigue fracture or plastic deformation prematurely, and potential safety hazards of bucket tooth falling are caused. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a bucket tooth with a firmly assembled bucket tooth main body and a tooth seat. The invention aims at realizing the following technical scheme that the excavator bucket tooth comprises the following components: The tooth holder is provided with an inserting convex part, the outer side wall of the inserting convex part is provided with at least two symmetrically arranged abutting surfaces, planes of the abutting surfaces are parallel to each other, an inserting cavity is formed in the tooth body, at least two abutting surfaces are arranged on the inner cavity wall of the inserting cavity, and when the inserting convex part is inserted into the inserting cavity, the abutting surfaces are in abutting or clearance fit with the corresponding abutting surfaces. In the excavator bucket tooth, the plurality of abutting surfaces are connected end to end in sequence to form the annular surface. In the excavator bucket tooth, the cross section of the grafting convex part gradually contracts inwards towards the grafting direction of the tooth holder, and the abutting surface is respectively arranged at one end of the grafting convex part, which is close to the tooth holder, and one end of the grafting convex part, which is far away from the tooth holder. In the excavator bucket tooth, one of the insertion convex part and the insertion cavity is provided with the limit concave part, and the other one of the insertion convex part and the insertion cavity is provided with the limit convex part, and the limit concave part can be inserted and fixed with the limit convex part. In the excavator bucket tooth, the inserting groove is formed in the inserting convex portion, the through locking hole is formed in the bucket tooth, the plug pin is detachably arranged in the inserting groove, when the plug pin is fixed in the inserting groove, the end portion of the plug pin stretches into the locking hole, the side face of the plug pin is provided with the movable abutting portion, a deformation piece capable of deforming is arranged between the movable abutting portion and the plug pin, and when the plug pin is fixed in the plug pin, the movable abutting portion abuts against the hole wall of the locking hole. In the excavator bucket tooth, the end part of the bolt is provided with the locking part, the locking part can rotate relative to the bolt, the locking part is provided with a first working position and a second working position, when the locking part is in the first working position, the locking part is positioned in an axial projection area of the end part of the bolt, and when the locking part is in the second working position, at least part of the area of the locking part protrudes out of the axial projection area of the end part of the bolt and is propped against the inserting convex part or the bucket tooth. In the excavator tooth, as the linear distance between the movable contact portion and the locking portion increases, the linear distance between the outer surface of the movable contact portion and the axis of the latch increases. In the excavator bucket tooth, the mounting hole is formed in the bolt, the limiting pin is arran