Quick-change excavator bucket tooth connecting mechanism

Abstract

The utility model discloses a quick change excavator bucket tooth connecting mechanism relates to excavating equipment technical field, this quick change excavator bucket tooth connecting mechanism includes: bucket body, fixed setting in the shovel lip board, one end is equipped with the ear seat, bucket tooth includes the connecting portion and the tooth body, and the tooth body is the wedge structure, and the connecting portion sets up in the tooth body, and the connecting portion is equipped with the fork connecting piece corresponding the ear seat, and the ear seat and the fork connecting piece all are equipped with the pin hole, the wedge pin is conical platform structure, one end is equipped with the annular recess, and the wedge pin is in detachable mode and is in turn set up in the ear seat, the fork connecting piece and carries out the clamping connection, the elastic lock piece, the annular structure of one end opening is in detachable mode and is along the annular recess and is set up in the wedge pin. The utility model discloses adopting the wedge pin design, and when disassembling, the radial component force is generated through the inclined plane of wedge pin, thereby overcoming the friction of interference fit, and the disassembling process is labor saving and efficient, and the operator does not need to carry out violent hammering, improves maintenance efficiency and operation safety.

Description

Technical Field

[0001] This utility model relates to the field of excavation equipment technology, and in particular to a quick-change excavator bucket tooth connection mechanism. Background Technology

[0002] Excavator bucket teeth are wear parts that come into direct contact with materials and require frequent replacement during actual use. Currently, most excavator bucket teeth are fixed using a traditional pin-and-pin structure. This involves a pin hole at the tail of the tooth, a mounting base on the shovel body corresponding to the tooth, and a through hole corresponding to the pin hole on the mounting base. The tail of the tooth is fitted onto the mounting base, and a pin is then passed through the pin hole and through hole in sequence. When replacing the teeth, the operator needs to use a hammer or other striking tool to tap the cylindrical pin, forcing it out of the pin hole to remove the old tooth. When installing a new tooth, the new tooth must be aligned with the pin hole before hammering the pin in. Snap rings or locking pins are then installed at both ends of the new tooth to prevent it from falling out. This method has long been the standard procedure in the industry.

[0003] However, existing technologies have the following significant drawbacks: First, the pins are subjected to tremendous impact and erosion from mud and sand during excavation, often resulting in deformation and corrosion, making disassembly difficult and requiring a large amount of manpower and time. Second, the hammering operations used for disassembly in confined spaces may pose certain safety hazards to the operators.

[0004] Therefore, there is a need for a quick-change excavator bucket tooth connection mechanism that is efficient and safe to use. Utility Model Content

[0005] The main purpose of this utility model is to provide a quick-change excavator bucket tooth connection mechanism, which aims to solve the problem that existing quick-change excavator bucket tooth connection mechanisms are difficult to ensure replacement efficiency and safe use.

[0006] To achieve the above objectives, the quick-change excavator bucket tooth connecting mechanism proposed in this utility model is applied to the bucket lip plate and includes:

[0007] The bucket body is fixedly mounted on the bucket lip plate, and one end of the bucket body is provided with an ear seat;

[0008] The bucket tooth includes a connecting part and a tooth body. The tooth body has a wedge-shaped structure. The connecting part is located at the end of the tooth body. The connecting part is provided with a fork-shaped connector corresponding to the ear seat. Both the ear seat and the fork-shaped connector are provided with pin holes. The fork-shaped connector is detachably connected to the ear seat. The axis of the pin hole of the fork-shaped connector is parallel to that of the pin hole of the ear seat, and the inner diameter of the pin holes is equal.

[0009] A wedge pin, wherein the wedge pin has a frustum conical structure, one end of the wedge pin is provided with an annular groove, the annular groove is arranged along the circumference of the wedge pin, and the wedge pin is detachably inserted into the tooth body, the ear seat, and the fork-shaped connector in sequence and engaged.

[0010] The elastic locking piece is an annular structure with an opening at one end, and is detachably fitted onto the wedge pin along the opening direction of the annular groove.

[0011] Preferably, there are multiple ear seats, which are arranged parallel to each other along the extension direction of the bucket body, and the space between the multiple ear seats forms an insertion groove, and the pin holes between the multiple ear seats are coaxially arranged.

[0012] Preferably, there are multiple fork-shaped connectors, which extend outward along the axis of the connecting part and are arranged side by side, and the multiple fork-shaped connectors abut against the ear seat along the extension direction of the insertion groove.

[0013] Preferably, the elastic locking piece has a C-shaped annular structure with one end open, and the inner diameter of the elastic locking piece is smaller than the bottom diameter of the annular groove. The elastic locking piece is engaged with the wedge pin along the opening direction of the annular groove.

[0014] Preferably, the quick-change excavator bucket tooth connecting mechanism further includes a wear-resistant sleeve, which is fixedly connected to the hole wall of the pin hole along the axis of the pin hole of the lug and the pin hole opened on the fork-shaped connector. The wear-resistant sleeve has a ring-shaped structure, and the inner hole of the wear-resistant sleeve is a conical hole that mates with the wedge-shaped pin.

[0015] This utility model adopts a wedge pin design. During disassembly, the axial striking force is generated through the inclined surface of the wedge pin to produce a radial component force that can make the pin retract, thereby overcoming the frictional force of the interference fit. The disassembly process is labor-saving and efficient, without the need for operators to hammer violently. In addition, the wedge pin can eliminate the fit gap between the bucket teeth and the bucket body during installation, avoiding impact and loosening during operation, and improving maintenance efficiency and operational safety. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the quick-change excavator bucket tooth connection mechanism according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the bucket body according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of a wedge pin according to an embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional structural diagram of the bucket teeth according to an embodiment of the present invention.

[0021] Explanation of icon numbers:

[0022]

[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that all directional indicators in this embodiment are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, the use of terms such as "first" and "second" in this utility model 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 that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0027] like Figures 1-4As shown, this utility model proposes a quick-change excavator bucket tooth connecting mechanism 1000 applied to a bucket lip plate 2000, comprising: a bucket body 100, which is fixedly mounted on a bucket lip plate 2000, with an ear seat 110 at one end of the bucket body 100; and bucket teeth 200, which includes a connecting part 210 and a tooth body 220, the tooth body 220 having a wedge-shaped structure. The connecting part 210 is located at the end of the tooth body 220, and the connecting part 210 is provided with a fork-shaped connector 211 corresponding to the ear seat 110. Both the ear seat 110 and the fork-shaped connector 211 are provided with pin holes 111, and the fork-shaped connector 211 is detachably connected to the ear seat 110. The fork-shaped connector 211 is parallel to the axis of the pin hole 111 of the ear seat 110, and the inner diameters of the pin holes 111 are equal. The wedge-shaped pin 300 is a frustum-shaped structure. One end of the wedge-shaped pin 300 is provided with an annular groove 310. The annular groove 310 is arranged along the circumference of the wedge-shaped pin 300. The wedge-shaped pin 300 is detachably inserted into the tooth body 220, the ear seat 110, and the fork-shaped connector 211 and engaged. The elastic locking piece 400 is an annular structure with an opening at one end. The elastic locking piece 400 is detachably sleeved on the wedge-shaped pin 300 along the opening direction of the annular groove 310.

[0028] In this embodiment, the wedge pin 300 has a frustum conical structure, thus having a larger diameter end (hereinafter referred to as the large end) and a smaller diameter end (hereinafter referred to as the small end). During the connection between the bucket teeth 200 and the bucket body 100, the operator first hammers the wedge pin 300 from the large end into the ear seat 110 on the aligned bucket body 100 and the pin hole 111 opened in the fork-shaped connector 211 on the bucket teeth 200. When the wedge pin 300 is installed in place, its small end protrudes from the bucket teeth 200, and the annular groove 310 on the small end is also fully exposed to the external environment. Finally, the operator presses the elastic locking piece 400 into the annular groove 310. That is, the elastic locking piece 400 is installed into the annular groove 310 after the wedge pin 300 is fully installed, forming a locking between the bucket teeth 200 and the bucket body 100, which has excellent locking force and vibration resistance. The disassembly process involves the operator unlocking and separating the elastic locking plate 400 from the annular groove 310, and then tapping the end face of the small end of the wedge pin 300 to make the wedge pin 300 retract.

[0029] In detail, this utility model uses a wedge-shaped pin 300 to replace the cylindrical pin commonly used in the prior art, and works in conjunction with an elastic locking piece 400 and an annular groove 310 to form an anti-loosening component. By utilizing the principle of inclined plane, the axial striking force of the operator is converted into a radial expansion locking force, so as to achieve quick disassembly while ensuring a firm connection.

[0030] In one embodiment, there are multiple ear seats 110, which are arranged parallel to each other along the extension direction of the bucket body 100. The space between the multiple ear seats 110 forms an insertion groove, and the pin holes 111 between the multiple ear seats 110 are coaxially arranged.

[0031] In this embodiment, there are at least two ear seats 110. The two parallel ear seats 110 form an insertion groove that can accommodate the fork-shaped connector 211 for engaging. This groove guides the fork-shaped connector 211 at the tail of the bucket tooth 200 to quickly align and insert into place, avoiding left-right wobbling and difficulty in aligning the holes during installation. The fork-shaped connector 211 is also provided with a pin hole 111. When the bucket tooth 200 is inserted into the bucket body 100, the pin hole 111 of the fork-shaped connector 211 on the connecting part 210 and the pin holes 111 on the two ear seats 110 on the left and right sides of the fork-shaped connector 211 are coaxially aligned to form a through channel. This channel provides a through hole for the wedge pin 300 to pass through, ensuring that the wedge pin 300 can generate a uniform radial clamping force after passing through the channel.

[0032] In one embodiment, there are multiple fork-shaped connectors 211. The multiple fork-shaped connectors 211 extend outward along the axis of the connecting portion 210 and are arranged side by side. The multiple fork-shaped connectors 211 abut against the ear seat 110 along the extension direction of the insertion groove.

[0033] In this embodiment, the tooth 220 is a wedge-shaped structure with an open slot at one end, and the fork-shaped connector 211 is disposed at the axis of the open slot and extends towards the opening. The fork-shaped connector 211 serves as a mechanical interface between the bucket tooth 200 and the bucket body 100, transmitting the impact force generated by digging on the tip of the tooth 220 during operation to the bucket body 100 through the fork-shaped connector 211 of the connecting part 210. The fork-shaped connector 211 is used to guide the bucket tooth 200 to quickly align with the bucket body 100. The fork-shaped connector 211 is welded or integrally cast onto the connecting portion 210 and extends outward from the connecting portion 210. Each fork-shaped connector 211 requires two corresponding lugs 110, and the two lugs 110 abut against the left and right sidewalls of the fork-shaped connector 211 respectively. The fork-shaped connector 211 is provided with pin holes 111, and when the fork-shaped connector 211 is fully inserted into the insertion groove formed by the two lugs 110, the pin holes 111 on the fork-shaped connector 211 are coaxial with the pin holes 111 on the two lugs 110, which facilitates the insertion of the wedge pin 300.

[0034] It is understandable that reinforcing ribs can be provided at the top of the fork-shaped connector 211 and at the root where it connects to the tooth body 220, in order to improve the mechanical structure of the part and extend the fatigue life of the fork-shaped connector 211.

[0035] In one embodiment, the elastic locking piece 400 has a C-shaped annular structure with one end open, and the inner diameter of the elastic locking piece 400 is smaller than the bottom diameter of the annular groove 310. The elastic locking piece 400 is engaged with the wedge pin 300 along the opening direction of the annular groove 310.

[0036] In this embodiment, the elastic locking piece 400 is a locking element used to prevent the wedge pin 300 from accidentally loosening or completely falling off during operation due to vibration and impact. When not in use, the elastic locking piece 400 is separate from the wedge pin 300. When in use, the elastic locking piece 400 is pressed into the annular groove on the small end of the wedge pin 300. Specifically, in its free state (separated from the wedge pin 300), the inner diameter of the elastic locking piece 400 is slightly smaller than the outer diameter of the bottom of the annular groove 310. During installation, pressure is applied to the elastic locking piece 400 after aligning it with the annular groove 310, causing it to elastically deform, fitting onto the wedge pin 300 and sliding into the annular groove 310. After the applied pressure is removed, the elastic locking piece 400 returns to its free state, locking the elastic locking piece 400 onto the bottom wall of the annular groove 310. Understandably, during the excavation process, the side walls on both sides of the annular groove 310 limit and fix the elastic locking plate 400 to prevent the elastic locking plate 400 from unlocking.

[0037] In one embodiment, the quick-change excavator bucket tooth connecting mechanism 1000 further includes a wear-resistant sleeve 500. The wear-resistant sleeve 500 is fixedly connected to the hole wall of the pin hole 111 along the axis of the pin hole 111 of the lug 110 and the pin hole 111 opened on the fork-shaped connector 211. The wear-resistant sleeve 500 has a ring-shaped structure, and the inner hole of the wear-resistant sleeve 500 is a conical hole that cooperates with the wedge pin 300.

[0038] In this embodiment, the wear-resistant sleeve 500 is made of alloy steel. The wear-resistant sleeve 500 is detachably embedded in the hole wall of the pin hole 111 by means of threads or snaps. That is, the wedge pin 300 only rubs against the wear-resistant sleeve 500 during insertion and withdrawal, so that wear only occurs on the replaceable wear-resistant sleeve 500, thus protecting the life of the bucket teeth 200 and the bucket body 100.

[0039] This utility model adopts a wedge pin design. During disassembly, the axial striking force is generated through the inclined surface of the wedge pin to produce a radial component force that can make the pin retract, thereby overcoming the frictional force of the interference fit. The disassembly process is labor-saving and efficient, eliminating the need for operators to use heavy hammers. Furthermore, the wedge pin can eliminate the fit gap between the bucket teeth and the bucket body during installation, avoiding impact and loosening during operation. It also has a simple structure, is easy to process and manufacture, and maintains reliability even under extreme working conditions, improving maintenance efficiency and operational safety.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A quick-change excavator bucket tooth connecting mechanism, applied to the bucket lip plate, characterized in that, include: The bucket body is fixedly mounted on the bucket lip plate, and one end of the bucket body is provided with an ear seat; The bucket tooth includes a connecting part and a tooth body. The tooth body has a wedge-shaped structure. The connecting part is located at the end of the tooth body. The connecting part is provided with a fork-shaped connector corresponding to the ear seat. Both the ear seat and the fork-shaped connector are provided with pin holes. The fork-shaped connector is detachably connected to the ear seat. The axis of the pin hole of the fork-shaped connector is parallel to that of the pin hole of the ear seat, and the inner diameter of the pin holes is equal. A wedge pin, wherein the wedge pin has a frustum conical structure, one end of the wedge pin is provided with an annular groove, the annular groove is arranged along the circumference of the wedge pin, and the wedge pin is detachably inserted into the tooth body, the ear seat, and the fork-shaped connector in sequence and engaged. The elastic locking piece is an annular structure with an opening at one end, and the elastic locking piece is detachably fitted onto the wedge pin along the opening direction of the annular groove.

2. The quick-change excavator bucket tooth connecting mechanism as described in claim 1, characterized in that, The number of ear seats is multiple, and the multiple ear seats are arranged parallel to each other along the extension direction of the bucket body. The space between the multiple ear seats forms an insertion groove, and the pin holes between the multiple ear seats are coaxially arranged.

3. The quick-change excavator bucket tooth connecting mechanism as described in claim 2, characterized in that, The number of fork-shaped connectors is multiple, and the multiple fork-shaped connectors extend outward along the axis of the connecting part and are arranged side by side. The multiple fork-shaped connectors abut against the ear seat along the extension direction of the insertion groove.

4. The quick-change excavator bucket tooth connecting mechanism as described in claim 1, characterized in that, The elastic locking piece has a C-shaped ring structure with one end open, and the inner diameter of the elastic locking piece is smaller than the bottom diameter of the annular groove. The elastic locking piece is engaged with the wedge pin along the opening direction of the annular groove.

5. The quick-change excavator bucket tooth connecting mechanism as described in claim 4, characterized in that, The quick-change excavator bucket tooth connection mechanism also includes a wear-resistant sleeve. The wear-resistant sleeve is fixedly connected to the hole wall of the pin hole along the axis of the pin hole of the lug and the pin hole opened on the fork-shaped connector. The wear-resistant sleeve has a ring-shaped structure, and the inner hole of the wear-resistant sleeve is a conical hole that cooperates with the wedge pin.

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