Excavator bucket tooth capable of extending service life

Abstract

The utility model relates to an excavator bucket tooth with a prolonged service life, comprising a tooth seat, a tooth tip arranged at the top of the tooth seat, and a detachable latch pin laterally inserted between the tooth seat and the left and right sides of the tooth tip; the tooth tip is in a quadrangular pyramid shape, and a detachable tongue block is further arranged inside the tooth sleeve, the top and bottom of the tongue block are both outwardly formed with a main body portion symmetrically arranged, and the end of an upper main body portion extends above the top of the tooth sleeve; a first prism-shaped sinking cavity is provided at the top of the tooth sleeve, a prism-shaped or prism-shaped channel is provided between the bottom surface of the first prism-shaped sinking cavity and the bottom surface of the positioning concave cavity, the root of an upper main body portion is arranged in the first prism-shaped sinking cavity, and the root of a lower main body portion is arranged in the prism-shaped or prism-shaped channel; the utility model avoids wasting materials, reduces the use cost, and also prolongs the service life by one time.

Description

Technical Field

[0001] The utility model relates to an excavator bucket tooth with a prolonged service life. Background Art

[0002] An excavator is a common earth-moving machine with a row of bucket teeth on the edge of its bucket. The bucket teeth consist of a tooth seat and tooth tips. The tooth seat is fixed on the bucket, and the tooth tips are detachably fixed to the tooth seat by pins. When the tooth tips fail due to severe wear, only the tooth tips need to be replaced.

[0003] However, the failure part of the tooth tip is often concentrated in the part with smaller thickness at the end, while the other parts of the tooth tip can still be used. Since the existing tooth tip is made of integral casting, even if only the end part is worn and failed, it must be replaced as a whole. Therefore, there is a waste of materials, resulting in high cost of use and short service life, which needs further improvement. Utility Model Content

[0004] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide an excavator bucket tooth with an extended service life, which avoids material waste, reduces use costs, and doubles the service life.

[0005] The utility model solves the above technical problems by adopting the following technical solutions: an excavator bucket tooth with a prolonged service life, comprising a tooth seat, a tooth tip disposed at the top of the tooth seat, and a detachable pin laterally inserted between the tooth seat and the left and right sides of the tooth tip; a positioning convex block is formed upwardly at the top of the tooth seat, and correspondingly, a positioning cavity that cooperates with the positioning convex block is formed at the bottom of the tooth tip, the positioning cavity is sleeved outside the positioning convex block, and the pin passes through the positioning convex block, and is characterized in that:

[0006] The tooth tip is in the shape of a quadrangular pyramid, and a detachable tongue block is provided inside the tooth tip. The top and bottom of the tongue block are both formed with a main body portion symmetrically arranged outward, and the end of the upper main body portion extends above the top of the tooth tip;

[0007] A first prism-shaped sink cavity is formed at the top of the tooth tip, a prism-shaped or prism-shaped channel is formed between the bottom surface of the first prism-shaped sink cavity and the bottom surface of the positioning cavity, the root of the upper main body is arranged in the first prism-shaped sink cavity, and the root of the lower main body is arranged in the prism-shaped or prism-shaped channel;

[0008] The front and rear edges of the end of the main body are both formed with a first inclined surface symmetrically arranged, and the two first inclined surfaces respectively cooperate with the front and rear inner walls of the first prism-shaped sinking cavity; the left and right edges of the end of the main body are both formed with a second inclined surface symmetrically arranged, and the two second inclined surfaces respectively cooperate with the left and right inner walls of the first prism-shaped sinking cavity.

[0009] Preferably, a first notch cavity is provided on each of the two first inclined surfaces on an upper main body portion and the two first inclined surfaces on a lower main body portion, and the four first notch cavities are symmetrically arranged in pairs, and the vertical cross-section shape of the first notch cavity is a triangle.

[0010] Preferably, at least two first positioning screws are inserted and threaded on both sides of the front and rear of the tooth tip, and the threaded end of each of the first positioning screws extends obliquely upward into a first notch cavity on the same side of a main body portion located below and presses against the inner wall of the first notch cavity close to the dividing surface of the tongue block so that the two first inclined surfaces and the two second inclined surfaces on the upper main body portion are respectively tightly attached to the inner walls around the first prism-shaped sink cavity.

[0011] Preferably, a second transversely arranged positioning screw is inserted and threaded on both sides of the left and right sides of the tooth tip, and the threaded ends of the two second positioning screws extend into the prismatic or pyramidal channel and are respectively tightened against two second inclined surfaces on a main body below to prevent the tongue block from shaking left and right.

[0012] Preferably, an end portion of the positioning protrusion is provided with an inverted second pyramid-shaped cavity that cooperates with the end portion of the main body.

[0013] Preferably, a first chamfered edge is formed on the front and rear edges of the top of the tooth tip, and a second chamfered edge is formed on the left and right edges of the top of the tooth tip. The two first chamfered edges respectively cooperate with the two first inclined surfaces on an upper main body portion, and the two second chamfered edges respectively cooperate with the two second inclined surfaces on an upper main body portion.

[0014] Preferably, the front and rear outer walls of the tooth tip each form a second notch cavity symmetrically arranged with respect to each other, the vertical cross-section of the second notch cavity is triangular, and at least two first threaded holes are provided between the upper inner wall of each of the second notch cavity and the corresponding side inner wall of the prismatic or pyramidal channel, the number of the first threaded holes is equal to the number of the first positioning screws, and each of the first positioning screws is inserted and threaded into a corresponding first threaded hole.

[0015] Preferably, a countersunk hole is provided on the left and right outer walls of the tooth tip, and a second threaded hole is provided between the bottom center of each countersunk hole and the corresponding side inner wall of the prismatic or pyramidal channel, and two second positioning screws are respectively inserted and screwed into the two second threaded holes so that the heads of the two second positioning screws are respectively arranged in the two countersunk holes.

[0016] Compared with the prior art, the utility model has the following advantages: a detachable tongue block is provided at the end of the tooth tip of the utility model. When one of the main bodies extending above the top of the tooth tip fails due to wear, the positions of the two main bodies can be exchanged to allow the other main body with a good structure to extend above the top of the tooth tip for continued use. In this way, there is no need to replace the tooth tip to avoid waste of materials. When both main bodies fail, only a new tongue block needs to be replaced, thereby reducing the cost of use. Since the two main bodies on the tongue block can be exchanged and used in turn, the service life is doubled compared to the disposable tooth tip in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a top view of the exploded structure of the utility model from the right front side;

[0018] Figure 2 It is a left side cross-sectional structural diagram of the utility model;

[0019] Figure 3 It is a front cross-sectional structural diagram of the utility model. DETAILED DESCRIPTION

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0022] like Figures 1 to 3As shown, an excavator bucket tooth with a prolonged service life comprises a tooth holder 1, a tooth tip 2 arranged on the top of the tooth holder 1, and a detachable latch 3 laterally inserted between the tooth holder 1 and the left and right sides of the tooth tip 2;

[0023] A positioning protrusion 11 is formed upwardly at the top of the tooth seat 1, and correspondingly, a positioning cavity 21 that cooperates with the positioning protrusion 11 is formed at the bottom of the tooth tip 2. The positioning cavity 21 is sleeved outside the positioning protrusion 11, and the latch 3 passes through the positioning protrusion 11;

[0024] The tooth tip 2 is in the shape of a quadrangular pyramid, and a detachable tongue block 4 is provided inside the tooth tip 2. The top and bottom of the tongue block 4 are both formed with a main body 41 symmetrically arranged outward, and the end of the upper main body 41 extends above the top of the tooth tip 2;

[0025] A first prism-shaped sink cavity 22 is formed at the top of the tooth tip 2, and a prism-shaped or prism-shaped channel 23 is formed between the bottom surface of the first prism-shaped sink cavity 22 and the bottom surface of the positioning cavity 21, and the root of an upper main body 41 is disposed in the first prism-shaped sink cavity 22, and the root of a lower main body 41 is disposed in the prism-shaped or prism-shaped channel 23;

[0026] The front and rear edges of the end of the main body 41 are both formed with a first inclined surface 42 which is symmetrically arranged, and the two first inclined surfaces 42 respectively cooperate with the front and rear inner walls of the first prism-shaped sinking cavity 22; the left and right edges of the end of the main body 41 are both formed with a second inclined surface 43 which is symmetrically arranged, and the two second inclined surfaces 43 respectively cooperate with the left and right inner walls of the first prism-shaped sinking cavity 22.

[0027] A first notch cavity 44 is formed on each of the two first inclined surfaces 42 on the upper main body 41 and the two first inclined surfaces 42 on the lower main body 41 . The four first notch cavities 44 are symmetrically arranged in pairs, and the vertical cross-section of the first notch cavity 44 is a triangle.

[0028] At least two first positioning screws 5 are inserted and threaded on both the front and rear sides of the tooth tip 2. The threaded end of each first positioning screw 5 extends obliquely upward into a first notch cavity 44 on the same side of a main body 41 located below and presses against the inner wall of the first notch cavity 44 close to the dividing surface of the tongue block 4 so that the two first inclined surfaces 42 and the two second inclined surfaces 43 on the upper main body 41 are respectively tightly attached to the inner walls around the first prism-shaped sink cavity 22.

[0029] A transversely arranged second positioning screw 6 is inserted and threaded on both sides of the left and right sides of the tooth tip 2. The threaded ends of the two second positioning screws 6 extend into the prismatic or pyramidal channel 23 and are respectively pressed against two second inclined surfaces 43 on a main body 41 below to prevent the tongue block 4 from shaking left and right.

[0030] An inverted second pyramid-shaped cavity 12 is formed at the end of the positioning protrusion 11 and cooperates with the end of the main body 41 .

[0031] A first chamfered edge 25 is formed on the front and rear edges of the top of the tooth tip 2, and a second chamfered edge 26 is formed on the left and right edges of the top of the tooth tip 2. The two first chamfered edges 25 respectively cooperate with the two first inclined surfaces 42 on the upper main body 41, and the two second chamfered edges 26 respectively cooperate with the two second inclined surfaces 43 on the upper main body 41.

[0032] The outer walls on both the front and rear sides of the tooth tip 2 are formed with a second notch cavity 24 that is symmetrically arranged. The vertical cross-section of the second notch cavity 24 is triangular. At least two first threaded holes 27 are provided between the upper inner wall of each second notch cavity 24 and the corresponding side inner wall of the prismatic or pyramidal channel 23. The number of the first threaded holes 27 is equal to the number of the first positioning screws 5. Each first positioning screw 5 is inserted and threaded into a corresponding first threaded hole 27.

[0033] A countersunk hole 28 is provided on the left and right outer walls of the tooth tip 2, and a second threaded hole 29 is provided between the bottom center of each countersunk hole 28 and the corresponding side inner wall of the prismatic or pyramidal channel 23. Two second positioning screws 6 are respectively inserted and screwed into the two second threaded holes 29 so that the heads of the two second positioning screws 6 are respectively arranged in the two countersunk holes 28.

[0034] A first pin hole 13 is provided between the left and right outer walls of the positioning protrusion 11 and is located below the second prism-shaped countersunk cavity 12. Correspondingly, a second pin hole 210 is provided between the left and right outer walls of the tooth tip 2 and the corresponding side inner walls of the prismatic or prism-shaped channel 23, which are concentrically distributed and cooperate with the first pin hole 13. The latch pin 3 is detachably inserted into the first pin hole 13 and the two second pin holes 210.

[0035] Installation method:

[0036] The tooth seat 1 is fixed to the blade at the edge of the bucket on the excavator by screwing, welding or riveting, and then the positioning cavity 21 on the tooth tip 2 is sleeved on the outside of the positioning protrusion 11 on the tooth seat 1; finally, the pin 3 is inserted into the first pin hole 13 and the two second pin holes 210 to fix the tooth tip 2 on the tooth seat 1, and then it can be used normally.

[0037] Replacement method:

[0038] When a main body 41 located outside the tooth tip 2 is severely worn during use, the tongue block 4 can be replaced so that the two main bodies 41 can be interchanged. During replacement, the pin 3 is first removed to remove the tooth tip 2 from the tooth seat 1 in the same way, and then each first positioning screw 5 and each second positioning screw 6 are loosened in turn, and then the tongue block 4 is taken out through the prismatic or prism-shaped channel 23 and the positioning cavity 21, and then the tongue block 4 is turned 180 degrees to interchange the two main bodies 41. Next, the tongue block 4 is reversely installed back into the interior of the tooth tip 2 so that the other intact main body 41 extends out of the tooth tip 2; each first positioning screw 5 and each second positioning screw 6 are tightened in turn to push the tongue block 4 upward until it is fully clamped, and finally the tooth tip 2 is installed back on the tooth seat 1 in the same way, and then it can continue to be used with the help of the other intact main body 41.

[0039] When both main bodies 41 on the tongue block 4 fail, a new tongue block 4 can be replaced for continued use without replacing the tooth tip 2; when a main body 41 located inside the tooth tip 2 is intact, its end can be inserted into the second prism-shaped sinking cavity 12 to assist in positioning; when a main body 41 located inside the tooth tip 2 is damaged, if part of its end still has a structure lower than the opening of the second prism-shaped sinking cavity 12, the above structure can still be inserted into the second prism-shaped sinking cavity 12.

[0040] The utility model is provided with a detachable tongue block 4 at the end of the tooth tip 2. When one of the main bodies 41 extending above the top of the tooth tip 2 fails due to wear, the positions of the two main bodies 41 can be exchanged to make the other main body 41 with a good structure extend above the top of the tooth tip 2 for continued use. In this way, there is no need to replace the tooth tip 2 to avoid waste of materials. When both main bodies 41 fail, only a new tongue block 4 needs to be replaced, thereby reducing the cost of use. Since the two main bodies 41 on the tongue block 4 can be exchanged and used in turn, the service life is doubled compared with the disposable tooth tip 2 in the prior art.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An excavator bucket tooth with a prolonged service life, comprising a tooth seat, a tooth tip disposed on the top of the tooth seat, and a detachable pin laterally inserted between the tooth seat and the left and right sides of the tooth tip; a positioning protrusion is formed upwardly on the top of the tooth seat, and correspondingly, a positioning cavity is formed at the bottom of the tooth tip to cooperate with the positioning protrusion, the positioning cavity is sleeved outside the positioning protrusion, and the pin passes through the positioning protrusion, characterized in that: The tooth tip is in the shape of a quadrangular pyramid, and a detachable tongue block is provided inside the tooth tip. The top and bottom of the tongue block are both formed with a main body portion symmetrically arranged outward, and the end of the upper main body portion extends above the top of the tooth tip; A first prism-shaped sink cavity is formed at the top of the tooth tip, a prism-shaped or prism-shaped channel is formed between the bottom surface of the first prism-shaped sink cavity and the bottom surface of the positioning cavity, the root of the upper main body is arranged in the first prism-shaped sink cavity, and the root of the lower main body is arranged in the prism-shaped or prism-shaped channel; The front and rear edges of the end of the main body are both formed with a first inclined surface symmetrically arranged, and the two first inclined surfaces respectively cooperate with the front and rear inner walls of the first prism-shaped sinking cavity; the left and right edges of the end of the main body are both formed with a second inclined surface symmetrically arranged, and the two second inclined surfaces respectively cooperate with the left and right inner walls of the first prism-shaped sinking cavity.

2. The excavator bucket tooth with extended service life according to claim 1, characterized in that: A first notch cavity is provided on each of the two first inclined surfaces on an upper main body portion and the two first inclined surfaces on a lower main body portion. The four first notch cavities are symmetrically arranged in pairs, and the vertical cross-section shape of the first notch cavity is a triangle.

3. The excavator bucket tooth with extended service life according to claim 2, characterized in that: At least two first positioning screws are inserted and threaded on the front and rear sides of the tooth tip, and the threaded end of each of the first positioning screws extends upward at an angle into a first notch cavity on the same side of a main body portion located below and presses against the inner wall of the first notch cavity close to the middle dividing surface of the tongue block so that the two first inclined surfaces and the two second inclined surfaces on the upper main body portion are respectively tightly attached to the inner walls around the first prism-shaped sink cavity.

4. The excavator bucket tooth with extended service life according to claim 1, characterized in that: A transversely arranged second positioning screw is inserted and threadedly connected on both sides of the tooth tip. The threaded ends of the two second positioning screws extend into the prismatic or pyramidal channel and are respectively tightened against two second inclined surfaces on a main body below to prevent the tongue block from shaking left and right.

5. The excavator bucket tooth with extended service life according to claim 1, characterized in that: The end of the positioning protrusion is provided with an inverted second pyramid-shaped sink cavity which cooperates with the end of the main body.

6. The excavator bucket tooth with extended service life according to claim 1, characterized in that: A first chamfered edge is formed on the front and rear edges of the top of the tooth tip, and a second chamfered edge is formed on the left and right edges of the top of the tooth tip. The two first chamfered edges respectively cooperate with the two first inclined surfaces on an upper main body portion, and the two second chamfered edges respectively cooperate with the two second inclined surfaces on an upper main body portion.

7. The excavator bucket tooth with extended service life according to claim 3, characterized in that: The outer walls on both the front and rear sides of the tooth tip each form a second notch cavity which is symmetrically arranged with respect to each other. The vertical cross-section of the second notch cavity is a triangle. At least two first threaded holes are provided between the upper inner wall of each of the second notch cavity and the corresponding side inner wall of the prismatic or pyramidal channel. The number of the first threaded holes is equal to the number of the first positioning screws. Each of the first positioning screws is inserted and threaded into a corresponding first threaded hole.

8. The excavator bucket tooth with extended service life according to claim 4, characterized in that: A countersunk hole is provided on the left and right outer walls of the tooth tip, and a second threaded hole is provided between the bottom center of each countersunk hole and the corresponding side inner wall of the prismatic or pyramidal channel. Two second positioning screws are respectively inserted and screwed into the two second threaded holes so that the heads of the two second positioning screws are respectively arranged in the two countersunk holes.

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