CN117646472B - Bucket tooth fixing system and bucket tooth fixing method of single-lug structure - Google Patents
Bucket tooth fixing system and bucket tooth fixing method of single-lug structure Download PDFInfo
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- CN117646472B CN117646472B CN202410118435.XA CN202410118435A CN117646472B CN 117646472 B CN117646472 B CN 117646472B CN 202410118435 A CN202410118435 A CN 202410118435A CN 117646472 B CN117646472 B CN 117646472B
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- ear
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 208000002925 dental caries Diseases 0.000 claims abstract description 23
- 230000000903 blocking effect Effects 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 9
- 238000005266 casting Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000009412 basement excavation Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/2816—Mountings therefor
- E02F9/2833—Retaining means, e.g. pins
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/2858—Teeth characterised by shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
- F16B21/12—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with locking-pins or split-pins thrust into holes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The invention discloses a combined bucket tooth with a single-lug structure, wherein a tooth tip comprises a tooth body and an attached lug, a tooth cavity comprises a main cavity and an ear cavity, a limit groove and a tooth pin through hole are formed in the attached lug, an opening is formed in the upper side of a first position of the limit groove, and a blocking part is arranged above a second position of the limit groove; the tooth holder comprises a main head and an ear head at one side of the main head, the main head is inserted into the main cavity, and the ear head extends into the ear cavity; the ear head is positioned at the inner side of the tooth pin through hole; the tooth pin is inserted into the tooth pin through hole, and the handle of the tooth pin enters the limit groove along with the tooth pin from the opening of the first position and is blocked by the blocking part after rotating for a certain angle, so that the tooth tip is connected with the tooth seat; the bearing capacity and the impact resistance of the tooth body are improved by eliminating a high stress area caused by the hole opening of the tooth body; the self-adaptation of tooth chamber and toothholder in the excavation process that is favorable to more reduces tooth chamber wall risk of breaking, has solved the problem of casting shrinkage porosity, shrinkage cavity and gas pocket because of the pinhole is seted up to the toothholder.
Description
Technical Field
The present invention relates to a tooth assembly of excavating equipment, and more particularly, to a single ear tooth, tooth securing system and securing method, system for securing a single ear tooth to a tooth holder using a locking pin.
Background
Excavating equipment is equipment commonly used in engineering and mining industries, and a bucket is an important part on the excavating equipment. When excavating equipment is used for excavating, the excavating equipment often collides with stones and soil, and therefore, it is necessary to install wear-resistant bucket teeth on the front edge of the bucket.
Specifically, a tooth holder is fixedly connected to the bucket, and then the bucket teeth are fixed to the tooth holder through a lock pin. The tooth holder is fixed to the bucket by means of screws or welding.
The excavating tooth lock pin fixing system with the bulletin number of CN218060521U comprises a tooth seat, a bucket tooth and a lock pin assembly; the tooth holder comprises a nose part, and a non-circular lock body accommodating hole is formed in the nose part; the bucket tooth comprises an opening and an inner cavity for inserting a nose, and a pair of lock pin through holes communicated with the inner cavity are formed in two side walls of the bucket tooth; the lock pin component simultaneously passes through the lock body accommodating hole and the lock pin through hole, so that the tooth holder and the bucket tooth are connected.
The fixing system of the excavating tooth has the following defects: 1. the side wall of the bucket tooth is provided with a lock pin channel, so that the tooth cavity is provided with a high stress area, and the bearing capacity and the impact resistance of the tooth cavity are reduced: 2. the pin holes on the tooth holder can bring casting shrinkage porosity, shrinkage cavity and air holes, so that the strength of the tooth holder is reduced.
Disclosure of Invention
The invention aims to provide an excavating tooth fixing system capable of improving bearing capacity and impact resistance.
The technical scheme adopted for solving the technical problems is as follows: the combined bucket tooth with the single-lug structure comprises a tooth seat, tooth tips and tooth pins;
The tooth tip comprises a tooth body and an attaching lug, and tooth cavities with rear openings are arranged in the tooth body and the attaching lug;
The tooth cavity comprises a main cavity corresponding to the tooth body and an ear cavity corresponding to the auxiliary ear, and the ear cavity is communicated with one side of the main cavity;
The appendage comprises an upper wall, a side wall and a lower wall; the attaching lug is provided with a tooth pin through hole penetrating through the lug cavity, an upper pin hole is formed in the upper wall of the tooth pin through hole, and a lower pin hole is formed in the lower wall of the tooth pin through hole;
The tooth holder comprises a main head and a rear connecting part; the main head is inserted into the main cavity;
an ear head is arranged on one side of the main head; when the ear head stretches into the ear cavity, the ear head is positioned at the inner side of the tooth pin through hole;
the tooth pin is inserted into the tooth pin through hole to limit the lug head in the lug cavity, so that the tooth point is connected with the tooth seat.
The invention solves the technical problems by adopting the preferable technical proposal that: the tooth pin comprises a pin body, wherein the upper end of the pin body is positioned in the upper pin hole, and the lower end of the pin body is positioned in the lower pin hole;
the upper end of the tooth pin is provided with a handle perpendicular to the tooth pin, and the handle can drive the tooth pin to rotate;
The upper wall is provided with a limiting groove communicated with the through hole of the tooth pin, and the handle can rotate in the limiting groove by a certain angle with the tooth pin as the center;
An opening is formed in the upper side of the first position of the limiting groove, so that the handle can enter and exit the limiting groove from the opening of the first position along with the tooth pin;
And a blocking part is arranged above the second position of the limiting groove, the handle is blocked by the blocking part along with the rotation of the tooth pin into the second position, and the upward movement of the tooth pin is limited.
The invention solves the technical problems by adopting the preferable technical proposal that: the limiting groove is a fan-shaped groove, and the fan-shaped groove extends from the rear end face of the upper wall of the attaching lug to form a rear notch.
The invention solves the technical problems by adopting the preferable technical proposal that: the rear end face of the lug is provided with a concave arc-shaped face, and the concave arc-shaped face is matched with the outer peripheral face of the tooth pin.
The invention solves the technical problems by adopting the preferable technical proposal that: the tooth pin comprises a metal pin provided with the handle and a plastic pipe sleeved outside the metal pin.
The invention solves the technical problems by adopting the preferable technical proposal that: the end part of the main head is provided with a straight section, and the length of the straight section occupies the total length of the main head～The end of the main cavity is provided with a straight cavity.
The invention solves the technical problems by adopting the preferable technical proposal that: the plastic pipe deformation adjusts the fit clearance between the tooth pin and the tooth pin through hole, and enables the tooth pin to flexibly contact with the hole wall of the tooth pin through hole so that the load is borne by the tooth body and the main head.
The technical scheme adopted for solving the technical problems is as follows: a combined bucket tooth with a single lug structure comprises a tooth seat, tooth tips and tooth pins;
The tooth tip comprises a tooth body and an attaching lug, and tooth cavities with rear openings are arranged in the tooth body and the attaching lug;
The tooth cavity comprises a main cavity corresponding to the tooth body and an ear cavity corresponding to the auxiliary ear, and the ear cavity is communicated with one side of the main cavity;
The appendage comprises an upper wall, a side wall and a lower wall; the attaching lug is provided with a tooth pin through hole penetrating through the lug cavity, and an upper pin hole is formed in the upper wall of the tooth pin through hole;
the upper wall is provided with a limit groove communicated with the upper pin hole, an opening is formed in the upper side of a first position of the limit groove, and a blocking part is arranged above a second position of the limit groove;
The tooth holder comprises a main head and an ear head at one side of the main head, the main head is inserted into the main cavity, and the ear head stretches into the ear cavity; at least a portion of the ear is located inside the tooth pin through hole;
the upper end of the tooth pin is provided with a handle perpendicular to the tooth pin, and the handle can drive the tooth pin to rotate;
the tooth pin is inserted into the tooth pin through hole, and the handle follows the tooth pin to enter the limit groove from the opening of the first position;
The handle rotates in the limiting groove by a certain angle with the tooth pin as the center, the handle rotates with the tooth pin to enter the second position to be blocked by the blocking part, and the upward movement of the tooth pin is limited; and further, the ear head is limited to the inner side of the ear cavity, so that the tooth point is connected with the tooth seat.
The invention solves the technical problems by adopting the preferable technical proposal that: at least a portion of the ear is located inside the tooth pin through hole; the limiting groove is a fan-shaped groove which is opened from inside to outside, and the fan-shaped groove extends from the rear end face of the upper wall of the attaching lug to form a rear notch; the handle is accessed through the rear slot for operation.
The invention solves the technical problems by adopting the preferable technical proposal that: the tooth holder further comprises a rear connecting part positioned at the rear side of the main head;
The end part of the main head comprises a straight section with parallel opposite side surfaces and a ladder-shaped section with opposite side surfaces gradually and outwards inclined away from the straight section, and the rear connecting part is larger than the ladder-shaped section to form a step limiting structure; the length of the straight section occupies the total length of the main head ～The end part of the main cavity is provided with a straight cavity corresponding to the straight section and a flaring cavity corresponding to the stepped section.
The invention solves the technical problems by adopting the preferable technical proposal that: the tooth pin comprises a metal pin provided with the handle and an elastic protective sleeve sleeved outside the metal pin.
The invention solves the technical problems by adopting the preferable technical proposal that: the rear end face of the ear head is provided with an inward concave arc-shaped face; the elastic protection sleeve deforms to adjust the fit clearance between the tooth pin and the tooth pin through hole, and the tooth pin is in flexible contact with the hole wall of the tooth pin through hole, so that the load is borne by the tooth body and the main head.
The invention solves the technical problems by adopting the preferable technical proposal that: a method for fixing a combined bucket tooth with a single lug structure comprises the following steps:
Inserting the tooth holder into the tooth cavity of the tooth tip, wherein the main head stretches into the main cavity, and the ear head stretches into the ear cavity;
inserting the toothed pin into the toothed pin through hole, and enabling the handle to enter the limit groove along with the toothed pin from the opening of the first position;
The handle rotates for a certain angle with the tooth pin as the center in the limiting groove, the handle enters the second position along with the rotation of the tooth pin and is blocked by the blocking part, and the combined bucket tooth of the single-lug structure is fixed.
Compared with the prior art, the invention has the advantages that:
First, remove the pin connection structure from tooth body and main head to attach ear and ear head on, removed the pinhole of tooth cavity wall of tooth body, and then eliminated the high stress district of tooth body, improved the bearing capacity and the shock resistance of tooth body.
And the second, tooth point and tooth seat connection only exist in the attached ear and the ear head, so that the structure size is small and the constraint is small. The reduction of constraint is more beneficial to self-finding of the force-exerting position of the tooth cavity and the tooth seat in the excavating process, so that constraint stress is reduced, and the risk of cracking of the tooth cavity wall is reduced.
Thirdly, the pin holes of the tooth holder are removed, so that casting shrinkage porosity, shrinkage porosity and air holes caused by the pin holes are effectively solved, and the internal quality of the tooth holder is improved.
Drawings
The invention will be described in further detail below in connection with the drawings and the preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the invention. Moreover, unless specifically indicated otherwise, the drawings are merely schematic representations, not necessarily to scale, of the compositions or constructions of the described objects and may include exaggerated representations.
FIG. 1 is an overall schematic of a combined tooth of a single lug construction;
FIG. 2 is an exploded view of a combined tooth of a single lug construction;
FIG. 3 is an exploded view of a combined tooth of a single lug construction;
FIG. 4 is an exploded view III of a combined tooth of a single lug construction;
FIG. 5 is an exploded view of a combined tooth of a single lug construction;
FIG. 6 is an assembly view of a combined tooth of a single lug construction.
Reference numerals: a tooth holder 1; a tooth tip 2; a tooth pin 3; a tooth body 21; attachment ears 22; tooth cavity C; a main chamber C1; an ear cavity C2, an upper wall e; a side wall f; a lower wall g; a tooth pin through hole S; an upper pin hole S1; a lower pin hole S2; a main head 11; a rear connecting portion 12; an ear head 13; a pin body 31; a handle 32; a limit groove T; an opening K; a blocking part N; a metal pin 3a; an elastic protective sleeve 3b; a concave arc surface R; a straight section 11a; a stepped section 11b.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative, exemplary, and should not be construed as limiting the scope of the invention.
It should be noted that: like reference numerals denote like items in the following figures, and thus once an item is defined in one figure, it may not be further defined and explained in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. While the terms "first" and "second" are used for descriptive purposes only and not for purposes of limitation, there is no other directional meaning.
As shown in fig. 1, the present embodiment provides a combined bucket tooth of a single ear structure, which includes a tooth holder 1, a tooth tip 2, and a tooth pin 3.
Specifically, as shown in fig. 2 to 5, the tooth tip 2 includes a tooth body 21 and a lug 22 provided at one side of the rear section of the tooth body 21, and a tooth cavity C having a rear opening is provided in the tooth body 21 and the lug 22. The tooth cavity C includes a main cavity C1 corresponding to the tooth body 21 and an ear cavity C2 corresponding to the appendage 22, the ear cavity C2 being communicated at one side of the main cavity C1.
As shown in fig. 4, the lug 22 includes an upper wall e, a side wall f, and a lower wall g, and the lug 22 is provided with a tooth pin through hole S extending from the upper wall e to the lower wall g and penetrating the ear cavity C2, the tooth pin through hole S forming an upper pin hole S1 in the upper wall e, and the tooth pin through hole S forming a lower pin hole S2 in the lower wall g.
As shown in fig. 2 to 5, the tooth holder 1 includes a main head 11 and a rear connecting portion 12, and an ear head 13 is provided on one side of the main head 11. The outer contour of the main head 11 matches the inner contour of the main cavity C1, while the outer contour of the ear head 13 matches the inner contour of the ear cavity C2, the main head 11 is inserted into the main cavity C1, and the ear head 13 extends into the ear cavity C2.
As shown in fig. 2 to 6, after the ear head 13 enters the ear cavity C2, at least a part of the ear head 13 is located inside the tooth pin through hole S, and the tooth pin through hole S is not shielded by the ear head 13 so that the tooth pin 3 can be inserted into the tooth pin through hole S. And the tooth pin 3 is inserted into the tooth pin through hole S to limit the lug 13 to the inner side of the lug cavity C2, thereby connecting the tooth tip 2 with the tooth holder 1.
Compared with the traditional combined bucket tooth, the pin connection structure is moved to the lug 22 and the lug part from the tooth body 21 and the main tooth, the pin hole of the tooth cavity C wall of the tooth body 21 is removed, the high stress area of the tooth body 21 is eliminated, and the bearing capacity and the impact resistance of the tooth body 21 are improved.
In addition, compared with the traditional combined bucket tooth, the combined bucket tooth with the single-lug structure in the embodiment accords with the mechanical principle. In the traditional combined bucket tooth, the wall of the tooth cavity C is contacted with the two ends of the tooth pin 3, the contact point span is large, the constraint is large, and in the embodiment, the connection between the tooth tip 2 and the tooth seat 1 only exists in the lug 22 and the lug 13, the structural size is small, and the constraint is small. The reduction of constraint is more beneficial to the self-finding of the force-exerting positions of the tooth cavity C and the tooth seat 1 in the excavating process, so that the constraint stress is reduced, and the risk of cracking the wall of the tooth cavity C is reduced.
In other embodiments, a longitudinal through hole may be provided on the ear head 13, and when the ear head 13 enters the ear cavity C2, the aperture of the longitudinal through hole is greater than or equal to the tooth pin through hole S, and the tooth pin through hole S passes through the area of the longitudinal through hole, so that the solid portion of the ear head 13 is located inside the tooth pin through hole S, and the solid portion of the ear head 13 is prevented from shielding the tooth pin through hole S.
Preferably, in the present embodiment, the ear 13 is entirely located inside the projected area of the pin through hole S so as to avoid the pin through hole S. By the mode, the pin holes are prevented from being formed in the tooth holder 1, casting shrinkage porosity, shrinkage porosity and air holes caused by the pin holes are effectively solved, and the internal quality of the tooth holder 1 is greatly improved.
As shown in fig. 2 to 6, the upper end of the tooth pin 3 is provided with a handle 32 perpendicular to the tooth pin 3, and the handle 32 can drive the tooth pin 3 to rotate. The upper wall e of the lug 22 is provided with a limit groove T communicating with the tooth pin through hole S. The upper side of the first position of the limit groove T is provided with an opening, and the handle 32 follows the tooth pin 3 to enter and exit the limit groove T from the opening of the first position.
When the pin body 31 of the tooth pin 3 is inserted into the tooth pin through hole S, the upper end of the pin body 31 is located in the upper pin hole S1 and the lower end is located in the lower pin hole S2.
As shown in fig. 6, when the tooth pin 3 rotates, the handle 32 rotates around the tooth pin 3 by a certain angle to reach a second position of the limit groove T, a blocking part N is disposed above the second position of the limit groove T, and the handle 32 rotates with the tooth pin 3 to enter the second position and is blocked by the blocking part N, so that the tooth pin 3 is limited to move upwards and cannot be removed from the tooth pin through hole S, and the tooth pin 3 limits the ear to be separated from the ear cavity C2, thereby realizing connection between the tooth tip 2 and the tooth holder 1.
When the tooth pin 3 rotates in the direction, the handle 32 is switched from the second position of the limit groove T to the first position, the position limitation of the tooth pin 3 is released, and the tooth pin 3 can be taken out from the tooth pin through hole S, and the tooth tip 2 and the tooth seat 1 can be separated.
The direction of the tooth pin 3 may apply a force to the pin body 31 of the tooth pin 3 or to the handle 32. In this embodiment, the limiting groove T is a fan-shaped groove, and the fan-shaped groove extends from the rear end surface of the upper wall e of the attachment lug 22 to form a rear notch. The handle 32 is accessible through the rear slot for rotational operation.
As shown in fig. 4 and 6, the cross section of the handle 32 is square, and the handle 32 is in surface contact with the limit groove T, so that friction is increased, and an unmanned position change is avoided.
As shown in fig. 5, the tooth pin 3 includes a metal pin 3a provided with a handle 32 and an elastic protection sleeve 3b sleeved outside the metal pin 3 a. The flexible protective sheath 3b comprises a cylindrical body of metal pins 3a, while the handles 32 protrude from the sides of the flexible protective sheath 3b.
The fit clearance is arranged between the tooth pin 3 and the tooth pin through hole S, the elastic protection sleeve 3b adjusts the fit clearance between the tooth pin 3 and the tooth pin through hole S, and the tooth pin 3 is in flexible contact with the hole wall of the tooth pin through hole S, so that a flexible buffer effect is achieved, the load is borne by the tooth body 21 and the main head 11, and mechanical damage of any one of the tooth holder 1, the tooth tip 2 and the tooth pin 3 caused by stress caused by rigid contact is prevented. In addition, the elastic protective sleeve 3b can also prevent the tooth pin 3 from being rusted together with the tooth tip 2 and the tooth holder 1, thereby facilitating the disassembly.
Preferably, the elastic protective sleeve 3b is a plastic tube with high economical efficiency and practicability. The wall thickness is determined according to the nominal size of the product, and is generally 0.5-3.0 mm.
As shown in fig. 3, the rear end face of the ear head 13 has a concave arc face R which is fitted with the outer peripheral face of the tooth pin 3. The arrangement of the concave arc-shaped surface R is beneficial to reducing the gap between the tooth pin 3 and the ear head 13, improving the firmness and stability of connection, and also playing the role of avoiding the sharp point from damaging the elastic protective sleeve 3 b.
As shown in fig. 2, the end of the main head 11 includes a straight section 11a with parallel opposite sides and a stepped section 11b with opposite sides inclined gradually outwardly away from the straight section 11a, and the rear connecting portion 12 is larger than the stepped section 11b to form a step-restraining configuration.
The length of the straight section 11a taking up the length of the main head 11～The end of the main cavity C1 is provided with a flat cavity C11 corresponding to the flat section 11a and a flared cavity C12 corresponding to the stepped section 11 b.
The foregoing disclosure provides a single ear construction of a combination tooth and uses specific examples to illustrate the principles and embodiments of the present invention, and the above examples are provided to assist in understanding the present invention and the core concepts. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (11)
1. The utility model provides a combination formula bucket tooth of monaural structure which characterized in that: comprises a tooth seat, a tooth tip and a tooth pin;
The tooth tip comprises a tooth body and an attaching lug, and tooth cavities with rear openings are arranged in the tooth body and the attaching lug;
The tooth cavity comprises a main cavity corresponding to the tooth body and an ear cavity corresponding to the auxiliary ear, and the ear cavity is communicated with one side of the main cavity;
The appendage comprises an upper wall, a side wall and a lower wall; the attaching lug is provided with a tooth pin through hole penetrating through the lug cavity, an upper pin hole is formed in the upper wall of the tooth pin through hole, and a lower pin hole is formed in the lower wall of the tooth pin through hole;
The tooth holder comprises a main head and a rear connecting part; the main head is inserted into the main cavity;
an ear head is arranged on one side of the main head; when the ear head stretches into the ear cavity, the ear head is positioned at the inner side of the tooth pin through hole;
The tooth pin is inserted into the tooth pin through hole to limit the lug head in the lug cavity, so that the tooth point is connected with the tooth seat;
The tooth pin comprises a pin body, wherein the upper end of the pin body is positioned in the upper pin hole, and the lower end of the pin body is positioned in the lower pin hole;
the upper end of the tooth pin is provided with a handle perpendicular to the tooth pin, and the handle can drive the tooth pin to rotate;
The upper wall is provided with a limiting groove communicated with the through hole of the tooth pin, and the handle can rotate in the limiting groove by a certain angle with the tooth pin as the center;
An opening is formed in the upper side of the first position of the limiting groove, so that the handle can enter and exit the limiting groove from the opening of the first position along with the tooth pin;
A blocking part is arranged above the second position of the limiting groove, the handle rotates along with the toothed pin to enter the second position and is blocked by the blocking part, and the upward movement of the toothed pin is limited;
The cross section of the handle is square, and the handle is in surface contact with the limiting groove.
2. A single ear structured composite tooth as defined in claim 1 wherein:
the limiting groove is a fan-shaped groove, and the fan-shaped groove extends from the rear end face of the upper wall of the attaching lug to form a rear notch.
3. A single ear structured composite tooth as defined in claim 1 wherein:
The rear end face of the lug is provided with a concave arc-shaped face, and the concave arc-shaped face is matched with the outer peripheral face of the tooth pin.
4. A single ear structured composite tooth as defined in claim 2 wherein:
The tooth pin comprises a metal pin provided with the handle and a plastic pipe sleeved outside the metal pin.
5. A single ear structured composite tooth as defined in claim 1 wherein:
the end part of the main head is provided with a straight section, and the length of the straight section occupies the total length of the main head ~The end of the main cavity is provided with a straight cavity.
6. A single ear structured composite tooth as defined in claim 4 wherein:
The plastic pipe deformation adjusts the fit clearance between the tooth pin and the tooth pin through hole, and enables the tooth pin to flexibly contact with the hole wall of the tooth pin through hole so that the load is borne by the tooth body and the main head.
7. The utility model provides a combination formula bucket tooth of monaural structure which characterized in that: comprises a tooth seat, a tooth tip and a tooth pin;
The tooth tip comprises a tooth body and an attaching lug, and tooth cavities with rear openings are arranged in the tooth body and the attaching lug;
The tooth cavity comprises a main cavity corresponding to the tooth body and an ear cavity corresponding to the auxiliary ear, and the ear cavity is communicated with one side of the main cavity;
The appendage comprises an upper wall, a side wall and a lower wall; the attaching lug is provided with a tooth pin through hole penetrating through the lug cavity, and an upper pin hole is formed in the upper wall of the tooth pin through hole;
the upper wall is provided with a limit groove communicated with the upper pin hole, an opening is formed in the upper side of a first position of the limit groove, and a blocking part is arranged above a second position of the limit groove;
The tooth holder comprises a main head and an ear head at one side of the main head, the main head is inserted into the main cavity, and the ear head stretches into the ear cavity; at least a portion of the ear is located inside the tooth pin through hole;
the upper end of the tooth pin is provided with a handle perpendicular to the tooth pin, and the handle can drive the tooth pin to rotate;
the tooth pin is inserted into the tooth pin through hole, and the handle follows the tooth pin to enter the limit groove from the opening of the first position;
The handle is blocked by the blocking part along with the rotation of the tooth pin into the second position, the upward movement of the tooth pin is limited, and the ear head is further limited at the inner side of the ear cavity, so that the tooth point is connected with the tooth seat.
8. The single-lug structured composite tooth as defined in claim 7 wherein:
The lug is positioned at the inner side of the tooth pin through hole; the limiting groove is a fan-shaped groove which is opened from inside to outside, and the fan-shaped groove extends from the rear end face of the upper wall of the attaching lug to form a rear notch; the handle is accessed through the rear slot for operation.
9. The single-lug structured composite tooth as defined in claim 7 wherein:
the tooth holder further comprises a rear connecting part positioned at the rear side of the main head;
The end part of the main head comprises a straight section with parallel opposite side surfaces and a ladder-shaped section with opposite side surfaces gradually and outwards inclined away from the straight section, and the rear connecting part is larger than the ladder-shaped section to form a step limiting structure; the length of the straight section occupies the length of the main head ~The end part of the main cavity is provided with a straight cavity corresponding to the straight section and a flaring cavity corresponding to the stepped section.
10. The single-lug structured composite tooth as defined in claim 7 wherein:
The tooth pin comprises a metal pin provided with the handle and an elastic protective sleeve sleeved outside the metal pin;
The elastic protection sleeve deforms to adjust the fit clearance between the tooth pin and the tooth pin through hole, and the tooth pin is in flexible contact with the hole wall of the tooth pin through hole, so that the load is borne by the tooth body and the main head.
11. A method of securing a single lug structured composite tooth as claimed in any one of claims 2 to 10 wherein: the method comprises the following steps:
Inserting the tooth holder into the tooth cavity of the tooth tip, wherein the main head stretches into the main cavity, and the ear head stretches into the ear cavity;
inserting the toothed pin into the toothed pin through hole, and enabling the handle to enter the limit groove along with the toothed pin from the opening of the first position;
The handle rotates for a certain angle with the tooth pin as the center in the limiting groove, the handle enters the second position along with the rotation of the tooth pin and is blocked by the blocking part, and the combined bucket tooth of the single-lug structure is fixed.
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| CN117646472A (en) | 2024-03-05 |
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