An excavator bucket tooth and an excavator

Abstract

The utility model provides a kind of excavator bucket tooth and excavator, belong to mechanical technical field. Including;Bucket tooth main body, its upper is provided with pin hole;Tooth holder, it can be inserted between bucket tooth main body, and tooth holder is provided with locking hole;For connecting the locking mechanism of bucket tooth main body and tooth holder, it includes locking pin, locking pin is provided with external thread, locking hole is threaded hole, locking pin passes through locking hole and extends into pin hole, and locking pin is connected with locking hole thread, locking pin and one of tooth holder is provided with anti-rotation part, the other is provided with anti-rotation groove, anti-rotation part extends into anti-rotation groove to prevent locking pin relative locking hole rotation. Advantage is in between locking pin and locking hole Setting mutually matched anti-rotation part and anti-rotation groove, can effectively limit locking pin relative locking hole rotation in working process, prevent locking pin loosening or out due to vibration or impact, avoid the separation or relative sway between bucket tooth main body and tooth holder.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology, and in particular relates to an excavator bucket tooth and an excavator. Background Technology

[0002] Excavators, as key equipment in earthmoving construction, directly endure severe impacts, wear, and vibrations. The bucket teeth, as the vulnerable components at the front of the excavator bucket that directly contact the material, have a connection structure whose reliability directly affects the overall operating efficiency and safety of the machine. Currently, most common bucket teeth are detachably connected to the tooth holder via a pin structure, with the tooth holder fixed to the lip plate of the bucket. In actual use, the bucket teeth frequently withstand impacts, compression, and eccentric loads from the material, causing the connecting pin to loosen, wear, or even fall off. This can lead to the loss of bucket teeth or shaking at the connection point, affecting not only digging efficiency but also potentially damaging the bucket itself.

[0003] To address these issues, existing technologies often employ threaded connections combined with anti-loosening structures to secure bucket teeth. For example, an external thread is provided on the locking pin, allowing it to screw into the threaded hole of the tooth holder for axial locking. However, under conditions of high-intensity, high-frequency vibration, a simple threaded connection still struggles to prevent self-spinning loosening due to repeated impacts, potentially leading to the locking pin coming loose and the bucket teeth separating from the tooth holder. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a bucket tooth structure that strengthens the connection between the bucket teeth and the tooth base.

[0005] The objective of this utility model can be achieved through the following technical solution: a bucket tooth for an excavator, comprising:

[0006] The main body of the bucket teeth is provided with pin holes;

[0007] The tooth base can be inserted into the main body of the bucket tooth, and the tooth base is provided with a locking hole;

[0008] A locking mechanism for connecting the bucket tooth body and the tooth seat includes a locking pin with an external thread. The locking hole is a threaded hole, through which the locking pin extends into the pin hole and is threadedly connected to the locking hole. One of the locking pin and the tooth seat has an anti-rotation part, and the other has an anti-rotation groove. The anti-rotation part extends into the anti-rotation groove to prevent the locking pin from rotating relative to the locking hole.

[0009] In the excavator bucket teeth described above, the anti-rotation part is detachably disposed on the top of the locking pin along the axial direction of the locking pin, and an anti-rotation groove is provided on the locking hole along its axial direction. When the anti-rotation part is fixed to the locking pin, the anti-rotation part extends into the anti-rotation groove, and the anti-rotation part abuts against the groove wall of the anti-rotation groove to prevent the locking pin from rotating relative to the locking hole.

[0010] In the excavator bucket teeth described above, a connecting part is fixedly provided on the anti-rotation part, and a connecting through hole is provided on the connecting part. A set screw passes through the connecting through hole and is screwed and fixed to the locking pin.

[0011] In the above-mentioned excavator bucket teeth, a connecting part is fixedly provided on the anti-rotation part, and a connecting through hole is provided on the connecting part. Along the axial direction of the locking pin, a connecting groove is provided on the top of the locking pin, and the connecting part is embedded in the connecting groove and can be radially locked.

[0012] In the aforementioned excavator bucket teeth, the locking pin is provided with a first mounting groove, and a first abutting part made of elastic material is provided in the first mounting groove. A first pin head is provided on the first abutting part. The first mounting groove is located on the thread track of the locking pin, and the first pin head protrudes from the locking pin. A first positioning hole is provided on the inner wall of the locking hole. As the locking pin is screwed in, the first pin head gradually approaches the first positioning hole until it is inserted into the first positioning hole.

[0013] In the excavator bucket tooth described above, a mounting base is provided on the tooth seat, and a locking hole is formed on the mounting base. The mounting base and the tooth seat are detachably connected.

[0014] In the above-mentioned excavator bucket teeth, the tooth base is provided with a mounting cavity, the mounting seat is located in the mounting cavity, the inner wall of the mounting cavity is provided with a second positioning hole, the mounting seat is provided with a second mounting groove, the second mounting groove is provided with a second abutment part made of elastic material, the second abutment part is provided with a second pin, and the second pin is inserted into the second positioning hole.

[0015] In the excavator bucket teeth described above, the first positioning hole and the second positioning hole are respectively located on both sides of the locking pin along the axial direction.

[0016] In the above-mentioned excavator bucket tooth, when the bucket tooth body is installed and fixed to the tooth seat, there is a gap between the mounting seat and the bucket tooth body.

[0017] An excavator comprising the aforementioned excavator bucket teeth.

[0018] Compared with existing technologies, the beneficial effects of this utility model are as follows: By providing a mutually cooperating anti-rotation part and anti-rotation groove between the locking pin and the locking hole, the rotation of the locking pin relative to the locking hole during operation can be effectively restricted, preventing the locking pin from loosening or falling out due to vibration or impact, and avoiding separation or relative wobbling between the bucket tooth body and the tooth seat. This improves the reliability and durability of the connection, reduces maintenance frequency and the risk of accidental detachment, and enhances the operating efficiency and safety of the excavator under harsh working conditions. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0021] Figure 3 yes Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the locking pin structure;

[0023] Figure 5 This is a schematic diagram of the exploded structure of the locking mechanism;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the tooth holder;

[0025] Figure 7 This is an exploded view of the mounting base.

[0026] In the diagram, 100 is the main body of the bucket tooth; 101 is the pin hole; 200 is the tooth seat; 201 is the locking hole; 202 is the anti-rotation groove; 203 is the insertion hole; 204 is the mounting cavity; 205 is the first positioning hole; 206 is the second positioning hole; 300 is the locking pin; 301 is the connecting groove; 302 is the first mounting groove; 303 is the first abutting part; 304 is the first pin head; 305 is the fitting part; 306 is the limiting groove; 400 is the anti-rotation part; 401 is the connecting part; 402 is the connecting through hole; 403 is the gasket part; 404 is the set screw; 500 is the mounting base; 501 is the second mounting groove; 502 is the second abutting part; 503 is the second pin head. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] like Figures 1-7 As shown, an excavator bucket tooth includes:

[0030] The main body of the bucket tooth 100 is provided with a pin hole 101;

[0031] The tooth holder 200 can be inserted into the bucket tooth body 100, and the tooth holder 200 is provided with a locking hole 201;

[0032] A locking mechanism for connecting the bucket tooth body 100 and the tooth seat 200 includes a locking pin 300 with external threads. The locking hole 201 is a threaded hole. The locking pin 300 passes through the locking hole 201 and extends into the pin hole 101, and the locking pin 300 is threadedly connected to the locking hole 201. One of the locking pin 300 and the tooth seat 200 is provided with an anti-rotation part 400, and the other is provided with an anti-rotation groove 202. The anti-rotation part 400 extends into the anti-rotation groove 202 to prevent the locking pin 300 from rotating relative to the locking hole 201.

[0033] The excavator bucket teeth of this invention are threadedly connected to the locking hole 201 on the tooth holder 200 via a locking pin 300, and the locking pin 300 extends into the pin hole 101 of the bucket tooth body 100, thereby achieving a stable connection between the bucket tooth body 100 and the tooth holder 200. The tooth holder 200 can be fixedly connected to the lip plate of the bucket, ensuring the entire bucket tooth structure is robust and reliable. In particular, a mutually cooperating anti-rotation part 400 and anti-rotation groove 202 are provided between the locking pin 300 and the locking hole 201, which can effectively limit the rotation of the locking pin 300 relative to the locking hole 201 during operation, preventing the locking pin 300 from loosening or falling out due to vibration or impact, and avoiding separation or relative shaking between the bucket tooth body 100 and the tooth holder 200. This improves the reliability and durability of the connection, reduces the frequency of maintenance and the risk of accidental detachment, and enhances the operating efficiency and safety of the excavator under harsh working conditions.

[0034] Furthermore, along the axial direction of the locking pin 300, the anti-rotation part 400 is detachably provided on the top of the locking pin 300, and the tooth seat 200 is provided with an anti-rotation groove 202 extending along its axial direction. When the anti-rotation part 400 is fixed with the locking pin 300, the anti-rotation part 400 extends into the anti-rotation groove 202, and the anti-rotation part 400 abuts against the groove wall of the anti-rotation groove 202 to prevent the locking pin 300 from rotating relative to the locking hole 201.

[0035] After the locking pin 300 secures the bucket tooth body 100 and the tooth seat 200, the end of the anti-rotation part 400 extends axially into the anti-rotation groove 202 within the locking hole 201, and can slide in a directional manner along the straight extension direction of the anti-rotation groove 202 until the anti-rotation part 400 and the locking pin 300 are completely fixed. This prevents the locking pin 300 from loosening due to relative rotation under vibration or impact conditions. Furthermore, the cooperation between the anti-rotation part 400 and the anti-rotation groove 202 achieves mechanical anti-loosening locking of the locking pin 300, significantly improving the reliability of the connection structure. Simultaneously, the anti-rotation part 400 is detachable, facilitating on-site assembly and subsequent maintenance. While ensuring stable connection of the bucket teeth under high-intensity operation, it also considers ease of use and safety.

[0036] like Figure 1 , Figure 3 As shown, the outer end of the locking hole 201 is connected to the insertion hole 203, and the anti-rotation groove 202 is formed on the inner wall of the insertion hole 203.

[0037] A connecting part 401 is fixedly provided on the anti-rotation part 400. The connecting part 401 has a connecting through hole 402. A set screw 404 passes through the connecting through hole 402 and is threadedly connected to the locking pin 300, thereby detachably fixing the anti-rotation part 400 to the top of the locking pin 300. The fastening action of the set screw 404 achieves a stable connection between the anti-rotation part 400 and the locking pin 300, facilitating on-site installation and subsequent maintenance, while ensuring the reliable transmission of the anti-rotation function.

[0038] The connecting part 401 on the anti-rotation part 400 is embedded in the connecting groove 301 on the top of the locking pin 300 along the axial direction, and the connecting groove 301 and the connecting part 401 are connected by a polygonal structure. When the connecting part 401 is inserted into the connecting groove 301, a stop fit is formed in the radial direction, realizing radial locking and effectively preventing loosening or displacement of the two during operation. Combined with the axial fixing effect of the set screw 404, a dual constraint of axial and radial forces is formed, significantly improving the connection rigidity and stability between the anti-rotation part 400 and the locking pin 300. This structure not only ensures that the anti-rotation part 400 can be reliably positioned under severe vibration environment, but also facilitates quick assembly and disassembly, improves maintenance efficiency, and further ensures the safety and durability of the bucket tooth connection system.

[0039] It is worth mentioning that a gasket 403 is provided between the connecting part 401 and the groove wall of the connecting groove 301. This gasket 403 can be an elastic metal gasket or an engineering plastic gasket. It is positioned between the contact surfaces of the connecting part 401 and the connecting groove 301 to compensate for assembly gaps, improve fitting accuracy, and effectively mitigate the risk of loosening caused by long-term vibration and impact loads. Through the elastic pre-tightening effect of the gasket 403, a tight fit between the connecting part 401 and the connecting groove 301 can be maintained, enhancing the stability of the connection between the anti-rotation part 400 and the locking pin 300, and preventing fretting wear or axial movement.

[0040] Furthermore, a limiting groove 306 is provided on the top of the locking pin 300, and the anti-rotation part 400 extends into the anti-rotation groove 202 through the limiting groove 306. It is constrained in the radial direction by the side wall of the limiting groove 306, thereby locking the radial position of the anti-rotation part 400 and the locking pin 300.

[0041] The locking pin 300 is provided with a first mounting groove 302, and a first abutting part 303 made of elastic material is provided in the first mounting groove 302. The first abutting part 303 is provided with a first pin head 304 protruding from the surface of the locking pin 300. The first mounting groove 302 is located on the thread track of the locking pin 300, and a first positioning hole 205 is correspondingly provided on the hole wall of the locking hole 201. During the process of screwing the locking pin 300 into the locking hole 201, the first pin head 304 first contacts and is compressed against the toothed seat 200, causing the first abutment portion 303 to undergo elastic deformation. The first pin head 304 then retracts into the first mounting groove 302. When the locking pin 300 continues to screw into the predetermined position, the first mounting groove 302 aligns with the first positioning hole 205 along with the thread. Under the action of elastic restoring force, the first abutment portion 303 resets and pushes the first pin head 304 out, automatically inserting it into the first positioning hole 205, achieving mechanical limit locking and forming an automatic locking mechanism (at this time, part of the first pin head 304 is located in the first positioning hole 205, and part is located in the first mounting groove 302). This effectively prevents the locking pin 300 from dislodging due to reverse rotation or axial movement under vibration or impact conditions, improving the reliability and safety of the connection between the locking pin 300 and the toothed seat 200. Simultaneously, this anti-dislodgement structure automatically locks after installation without additional operation, improving assembly efficiency and maintenance convenience.

[0042] It is worth mentioning that, such as Figure 5 As shown, the end of the first abutment 303 is provided with a sleeve 305, and the first pin 304 extends into the sleeve 305 and is interference-fitted with it to achieve fixation with the first abutment 303.

[0043] A mounting base 500 is provided on the tooth holder 200, and a locking hole 201 is formed on the mounting base 500. The mounting base 500 is fixedly connected to the tooth holder 200 body by a detachable connection method (such as bolt connection or snap-fit ​​structure). When long-term use causes wear of the locking hole 201 or damage to the threads, it is not necessary to replace the entire tooth holder 200, which has a high cost. Only the damaged mounting base 500 needs to be disassembled and replaced to restore functionality. At the same time, the modular design enhances the versatility and replaceability of the structure, making it easy to change to a suitable type of mounting base 500 according to different working conditions, further improving the economy and operational flexibility of excavator bucket teeth.

[0044] Specifically, the gear seat 200 is provided with a mounting cavity 204, and the mounting base 500 is detachably disposed within the mounting cavity 204. A second positioning hole 206 is provided on the inner wall of the mounting cavity 204, and a corresponding second mounting groove 501 is provided on the mounting base 500. A second abutment part 502 made of elastic material is provided in the groove, and a second pin head 503 protruding outward is provided on the second abutment part 502. When the mounting base 500 is inserted into the mounting cavity 204, the second pin head 503 is first compressed by the cavity wall, thus compressing the elastic second abutment part 502. As the mounting base 500 continues to advance, when the second mounting groove 501 aligns with the second positioning hole 206, the second abutment part 502 pushes the second pin head 503 outward under the action of elastic restoring force and inserts it into the second positioning hole 206, thereby realizing automatic limiting and reliable connection between the mounting base 500 and the gear seat 200. This structure allows for quick assembly and locking of the mounting base 500 without the need for additional fasteners. The connection process is simple and efficient, and it has good vibration resistance and anti-loosening performance. When the mounting base 500, where the locking hole 201 is located, becomes worn or damaged due to long-term use, it can be easily removed and replaced by applying force to disengage the second pin 503 from the second positioning hole 206, greatly improving the convenience of maintenance.

[0045] It is worth mentioning that the mounting cavity 204 is designed as a stepped cavity structure. After the mounting seat 500 is installed, its top abuts against the stepped surface of the cavity, achieving precise axial positioning and pre-tightening. After the tooth seat 200 and the bucket tooth body 100 are assembled, the corresponding structure of the bucket tooth body 100 covers and seals the bottom opening of the mounting cavity 204, effectively preventing the mounting seat 500 from accidentally falling off due to vibration or impact during use, significantly improving the reliability and safety of the connection.

[0046] Furthermore, an appropriate axial clearance is provided between the mounting base 500 and the bucket tooth body 100. This clearance design serves as a buffer and isolation mechanism, ensuring that during excavator operation, the severe impact forces and wear loads borne by the bucket tooth body 100 are primarily borne by its own structure and the main connection part 401 with the tooth seat 200, rather than being directly transmitted to the mounting base 500 and its connecting structure. This not only protects the locking mechanisms inside the mounting base 500 (such as the locking hole 201, the second pin head 503, and the second positioning hole 206) from deformation or failure due to excessive force, but also extends the service life of the mounting base 500 and the entire connection system.

[0047] An excavator comprising the aforementioned excavator bucket teeth.

[0048] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An excavator bucket tooth, characterized in that, include: The main body of the bucket teeth is provided with pin holes; The tooth base can be inserted into the main body of the bucket tooth, and the tooth base is provided with a locking hole; A locking mechanism for connecting the bucket tooth body and the tooth seat includes a locking pin with an external thread. The locking hole is a threaded hole, through which the locking pin extends into the pin hole and is threadedly connected to the locking hole. One of the locking pin and the tooth seat has an anti-rotation part, and the other has an anti-rotation groove. The anti-rotation part extends into the anti-rotation groove to prevent the locking pin from rotating relative to the locking hole.

2. The excavator bucket tooth according to claim 1, characterized in that, Along the axial direction of the locking pin, the anti-rotation part is detachably disposed on the top of the locking pin, and an anti-rotation groove is provided on the locking hole along its axial direction. When the anti-rotation part is fixed to the locking pin, the anti-rotation part extends into the anti-rotation groove, and the anti-rotation part abuts against the groove wall of the anti-rotation groove to prevent the locking pin from rotating relative to the locking hole.

3. The excavator bucket tooth according to claim 2, characterized in that, A connecting part is fixedly provided on the anti-rotation part, and a connecting through hole is provided on the connecting part. The set screw passes through the connecting through hole and is screwed and fixed to the locking pin.

4. The excavator bucket tooth according to claim 3, characterized in that, A connecting part is fixedly provided on the anti-rotation part, and a connecting through hole is provided on the connecting part. Along the axial direction of the locking pin, a connecting groove is provided on the top of the locking pin, and the connecting part is embedded in the connecting groove and can be radially locked.

5. The excavator bucket tooth according to claim 1, characterized in that, The locking pin is provided with a first mounting groove, and a first abutting part made of elastic material is provided in the first mounting groove. A first pin head is provided on the first abutting part. The first mounting groove is located on the thread track of the locking pin. The first pin head protrudes from the locking pin. A first positioning hole is provided on the inner wall of the locking hole. As the locking pin is screwed in, the first pin head gradually approaches the first positioning hole until it is inserted into the first positioning hole.

6. The excavator bucket tooth according to claim 5, characterized in that, The gear seat is provided with a mounting base, and the locking hole is opened on the mounting base. The mounting base is detachably connected to the gear seat.

7. The excavator bucket tooth according to claim 6, characterized in that, The toothed seat is provided with a mounting cavity, and the mounting base is located in the mounting cavity. A second positioning hole is provided on the inner wall of the mounting cavity. A second mounting groove is provided on the mounting base. A second abutment part made of elastic material is provided in the second mounting groove. A second pin is provided on the second abutment part and the second pin is inserted into the second positioning hole.

8. The excavator bucket tooth according to claim 7, characterized in that, The first positioning hole and the second positioning hole are respectively located on both sides of the axial direction of the locking pin.

9. The excavator bucket tooth according to claim 6, characterized in that, When the bucket tooth body is installed and fixed to the tooth seat, there is a gap between the mounting seat and the bucket tooth body.

10. An excavator, characterized in that, Including excavator bucket teeth as described in any one of claims 1-9 above.

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