Lock pin assembly for excavating tooth connection

Abstract

The invention discloses a lock pin assembly for excavating tooth connection. The lock pin assembly comprises a lock pin, a lock lug and a lock cap. The lock cap comprises a cap head located at the first end and a threaded part located at the second end. A lock hole with an axial opening is formed in the second end of the lock cap; an elastic lock catch is arranged on one side of the junction of the cap head and the thread part; the locking lug comprises a base part on the outer side and a U-shaped bulge on the inner side, the locking lug is provided with a threaded hole, the threaded hole comprises an external threaded section and an internal threaded section, the external threaded section is positioned on the base part, and the internal threaded section is positioned on the inner wall of the inner end of the U-shaped bulge; a locking clamping groove is formed in the hole wall, close to the outer side face, of the threaded hole. A guide limiting groove extending from the outer end face of the locking lug to the threaded hole is formed between two opposite convex edges at the outer end of the U-shaped bulge; in the connecting state, the end of the lock pin slides into the threaded hole along the guide limiting groove, the lock cap is screwed into the threaded hole from the outer side of the lock lug, the end of the lock pin extends into the lock hole and abuts against the bottom of the lock hole, and the elastic lock catch and the locking clamping groove are clamped in a matched mode.

Description

Technical Field

[0001] The present invention relates to the technical field of excavating equipment, and in particular to a locking pin assembly for connecting excavating teeth. Background Art

[0002] The tooth sleeve on the front side of the excavation equipment directly acts on the excavated objects such as stones and soil is connected to the tooth seat of the excavation tooth through a locking pin assembly.

[0003] In the patented locking pin assembly and excavating tooth locking pin fixing system (CN218060521U), the locking pin assembly includes a lock body and a locking pin with a non-circular outer contour; the lock body is inserted into the lock body accommodating hole and cannot rotate; the lock body is provided with a pin hole, and the inner wall of the pin hole is provided with an elastic locking head protruding from the inner wall; the axial surface of the locking pin is provided with a recessed slide extending to the end face of the locking pin, and a recessed locking position is provided on one side of the end of the slide; the locking pin is inserted into the pin hole of the lock body, the middle section of the locking pin is wrapped by the lock body, and the pin ends at both ends of the locking pin are placed in the locking pin through hole; the locking pin is rotated at a certain angle; the elastic locking head is inserted into the recessed locking position from the recessed slide, thereby fixing the position of the locking pin and the lock body, and then fixing the bucket tooth and the tooth seat.

[0004] In the patented locking pin assembly and excavating tooth connection system with convenient insertion and removal (CN217267764U), the locking pin assembly includes a locking seat and a locking pin. The locking pin includes a conical section and a locking head, and the locking head is located at the large diameter end of the conical section; the outer peripheral wall of the locking head is provided with a slide groove extending axially to the inner end face of the locking head; a locking groove is provided on the circumferential side of the slide groove; the locking seat is provided with an axially penetrating pin hole matching the locking pin; the inner wall of the pin hole is provided with a radially protruding locking convex portion; the conical section has a conical surface; during the insertion of the locking pin, the conical surface plays a guiding role, making the insertion process smoother; during the removal of the locking pin, a gap is gradually formed between the conical surface of the conical section and the inner wall of the connecting through hole or the pin hole, so that the locking pin is easier to be removed, avoiding the problem of difficulty in inserting and removing the locking pin due to soil, mud, etc.

[0005] For large excavating teeth, the tooth sleeve is subjected to great impact and torque during operation. In the technical solution of the above patent document, only a convex part and a concave part are used to achieve the limit connection, and the structural stability is poor and it is easy to be damaged, thus affecting the fixing effect and service life of the excavating teeth. Summary of the invention

[0006] In view of the defects in the prior art, the technical problem to be solved by the present invention is to provide a locking pin assembly for connecting digging teeth.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: The technical solution adopted by the present invention to solve the above technical problems is: a locking pin assembly for connecting the excavating teeth, used to connect the tooth sleeve and the tooth seat, including a locking pin, a locking ear, and a locking cap; the locking pin is used to be inserted into the tooth seat, and the locking ear is used to be fixed on the tooth sleeve; The locking cap comprises a cap head at a first end and a threaded portion at a second end; the second end of the locking cap is provided with a locking hole with an axial opening; An elastic lock buckle is provided on one side of the junction between the cap head and the threaded part; the elastic lock buckle comprises an elastic rubber block and a metal fastener partially wrapped in the elastic rubber block; a plurality of buckle portions of the metal fastener protrude outward from the elastic rubber block; The locking ear comprises an outer base and an inner U-shaped protrusion, the locking ear is provided with a threaded hole, the threaded hole comprises an outer thread section and an inner thread section, the outer thread section is located at the base, and the inner thread section is located on the inner wall of the inner end of the U-shaped protrusion; A locking groove is provided on the wall of the threaded hole near the outer side surface; a guide limit groove is formed between two opposite ridges at the outer end of the U-shaped protrusion, and the outer end surface of the locking ear extends to the threaded hole; In the connected state, the end of the locking pin slides along the guide limit groove into the threaded hole, the locking cap is screwed into the threaded hole from the outside of the locking ear, the end of the locking pin extends into the locking hole and abuts against the bottom of the hole, and the elastic lock buckle cooperates with the locking slot to clamp.

[0008] The preferred technical solution adopted by the present invention to solve the above technical problem is: the end of the locking pin is a truncated cone structure with a diameter gradually increasing from the end surface inward, and the locking hole is a tapered hole with a diameter gradually decreasing from the notch inward.

[0009] The preferred technical solution adopted by the present invention to solve the above technical problems is: the threaded portion includes a first thread segment and a second thread segment, the outer diameter of the first thread segment is larger than the outer diameter of the second thread segment and the two form a stepped structure, and a groove is provided at the junction of the first thread segment and the cap head, and the elastic lock buckle is located in the groove.

[0010] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: the metal fastener includes two buckle parts spaced apart from each other and a transverse connecting part connecting the two buckle parts, and the spacing between the two buckle parts is the span of one buckle part; the buckle part has an outer convex arc surface; the locking slot includes a plurality of grooves with inner concave arc surfaces distributed continuously in a wave shape.

[0011] The preferred technical solution adopted by the present invention to solve the above technical problem is: the outer edge of the base is a distance away from the two opposite convex edges of the U-shaped protrusion to form a strip-shaped inserted rib structure.

[0012] The preferred technical solution adopted by the present invention to solve the above technical problem is: the inner end surface of the lock ear is inclined from the outer side to the inner side toward the inner end.

[0013] The preferred technical solution adopted by the present invention to solve the above technical problem is: a tapered hole section is provided on the outer side of the external thread section of the base, and the outer peripheral surface of the cap head is a frustum surface matching the tapered hole section.

[0014] Another technical solution adopted by the present invention to solve the above technical problem is: a locking pin assembly for connecting the excavating teeth, used to connect the tooth sleeve and the tooth seat, including a locking pin, a locking ear, and a locking cap; the locking pin is arranged on the tooth seat, and the locking ear is used to be fixed on the tooth sleeve; The locking cap comprises a cap head at a first end and a threaded portion at a second end; the second end of the locking cap is provided with a locking hole with an axial opening; An elastic lock buckle is provided on one side of the junction between the cap head and the threaded part; the elastic lock buckle comprises an elastic rubber block and a metal fastener partially wrapped in the elastic rubber block; a plurality of buckle portions of the metal fastener protrude outward from the elastic rubber block; The metal fastener comprises two mutually spaced buckle parts and a transverse connecting part connecting the two buckle parts, the distance between the two buckle parts is the span of one buckle part; the buckle part has an outer convex arc surface; The locking ear is provided with a threaded hole, and a locking slot is provided on the hole wall of the threaded hole near the outer side surface; the locking slot includes a plurality of slots with concave arc surfaces that are continuously distributed in a wave shape; In the connected state, the end of the locking pin is in the threaded hole, the locking cap is screwed into the threaded hole from the outside of the locking ear, the end of the locking pin extends into the locking hole and abuts against the bottom of the hole, and the elastic locking buckle is clamped in cooperation with the locking slot.

[0015] The preferred technical solution adopted by the present invention to solve the above technical problem is: the locking ear includes an outer base and an inner U-shaped protrusion, the threaded hole includes an external thread section and an internal thread section, the external thread section is located at the base, and the internal thread section is located on the inner wall of the inner end of the U-shaped protrusion; A locking groove is provided on the wall of the threaded hole near the outer side surface; a guide limit groove is formed between two opposite ridges on the outer end of the U-shaped protrusion, and the outer end surface of the lock ear extends to the threaded hole; in the connected state, the end of the locking pin slides into the threaded hole along the guide limit groove.

[0016] The preferred technical solution adopted by the present invention to solve the above technical problem is: the end of the locking pin is a truncated cone structure with a diameter gradually increasing from the end surface inward, and the locking hole is a tapered hole with a diameter gradually decreasing from the notch inward.

[0017] The preferred technical solution adopted by the present invention to solve the above technical problem is: the outer edge of the base is a distance away from the two opposite convex edges of the U-shaped protrusion to form a strip-shaped inserted rib structure; The inner end surface of the lock ear is inclined from the outer side to the inner side toward the inner end.

[0018] Compared with the prior art, the advantages of the present invention are: In the final connected state, the end of the locking pin extends into the threaded hole, the locking cap is screwed into the threaded hole, and the threaded portion is located between the end of the locking pin and the wall of the threaded hole. The wall of the threaded hole supports and strengthens the structure, making the connection more stable and firm. The interlocking connection between the locking cap and the end of the locking pin not only achieves radial fixation through sleeve connection, but also limits axial movement through end face abutment, so that the connection point between the tooth sleeve and the tooth seat is multiply fixed and strengthened. Secondly, the threaded screw connection method has a certain self-locking function, which further limits the circumferential freedom of the locking cap and the end of the locking pin, and provides sufficient torque bearing capacity, so that during the use of the excavation tooth, even if there is no cooperation between the elastic lock buckle and the locking slot, the locking cap is difficult to withdraw outward, and the stability of the connection can be maintained.

[0019] The setting of the guide limit groove not only plays an avoidance role so that the end of the locking pin can enter the threaded hole, but also the guide limit groove and the end of the locking pin play a guiding and correcting role during the connection process of the gear sleeve and the gear seat, making the insertion smoother and the positioning more accurate.

[0020] In addition, the cooperation between the two mutually spaced buckles and the wavy multi-slot locking slot not only improves the locking strength and disperses the force to avoid the separation of the buckle and the locking slot under general torque, but also has more adaptability, improving the convenience and stability of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 A schematic diagram of a locking pin assembly according to a preferred embodiment of the present invention; Figure 2 A cross-sectional view of a locking pin assembly according to a preferred embodiment of the present invention; Figure 3 Schematic diagram of a lock ear of a preferred embodiment of the present invention Figure 1 ; Figure 4 Schematic diagram of a lock ear of a preferred embodiment of the present invention Figure 2 ; Figure 5 A schematic diagram of a lock cap according to a preferred embodiment of the present invention; Figure 6 A schematic diagram of an elastic lock buckle according to a preferred embodiment of the present invention; Figure 7 A schematic diagram of a gear holder according to a preferred embodiment of the present invention; Figure 8 A schematic diagram of a gear sleeve according to a preferred embodiment of the present invention; Fig. 9 A cross-sectional view of an assembly state of an excavating tooth according to a preferred embodiment of the present invention; Fig.10 For the preferred embodiment of the present invention Fig. 9 A partial enlarged schematic diagram of .

[0023] Reference numerals: Gear sleeve 10; gear seat 20; locking pin 1; locking ear 2; locking cap 3; cap head 31; threaded portion 30; locking hole 34; elastic lock buckle 4; elastic rubber block 41; metal fastener 42; buckle portion e; threaded hole 5; locking slot s; base 21; U-shaped protrusion 22; external thread section 51; internal thread section 52; convex ridge 22a; guide limit groove c; tool hole k; transverse connecting portion t; groove position f; concave and convex rib structure y; first thread section 32; second thread section 33; groove q; tapered hole section w; frustum h; strip dowel m; strip slot n. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0025] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the invention product is usually placed when in use, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. "First" and "second" are only for the purpose of making the description easier to understand, without any other directional meaning, and cannot be used as a limitation on the present invention.

[0027] like Figure 1 , 9 As shown, this embodiment provides a locking pin assembly for connecting a tooth sleeve 10 and a tooth seat 20 of an excavating tooth, comprising a locking pin 1, a locking ear 2, and a locking cap 3. The locking pin 1 is arranged on the tooth seat 20, and the locking ear 2 is used to be fixed on the tooth sleeve 10. The locking pin 1 can be a shaft member that is separately and laterally passed through the tooth seat 20, or it can be an extended protrusion on both sides of the tooth seat 20.

[0028] like Figure 2-5 As shown, the lock cap 3 includes a cap head 31 located at the first end and a threaded portion 30 located at the second end. The second end of the lock cap 3 is provided with a lock hole 34 with an axial opening. An elastic lock buckle 4 is provided on one side of the junction of the cap head 31 and the threaded portion 30. The elastic lock buckle 4 includes an elastic rubber block 41 and a metal fastener 42 partially wrapped in the elastic rubber block 41. Several buckle portions e of the metal fastener 42 protrude from the elastic rubber block 41. The lock ear 2 is provided with a threaded hole 5, and a locking card groove s is provided near the outer side of the hole wall of the threaded hole 5.

[0029] Furthermore, if Figure 3-4 As shown, the lock ear 2 includes an outer base 21 and an inner U-shaped protrusion 22, and the threaded hole 5 includes an outer thread section 51 and an inner thread section 52, wherein the outer thread section 51 is located at the base 21, and the inner thread section 52 is located on the inner wall of the inner end of the U-shaped protrusion 22. A locking groove s is provided near the outer side surface of the hole wall of the threaded hole 5. A guide limit groove c extending from the outer end surface of the lock ear 2 to the threaded hole 5 is formed between two opposite convex ridges 22a at the outer end of the U-shaped protrusion 22. In the connected state, the end of the lock pin 1 slides into the threaded hole 5 along the guide limit groove c.

[0030] Preferably, if Figure 1 As shown, the end surface of the cap head 31 is provided with a tool hole k for operation of a screwing tool. The lock cap 3 is screwed onto the lock ear 2 under an external force applied by a tool.

[0031] Furthermore, if Figure 2-6 As shown, the metal fastener 42 includes two mutually spaced fasteners e and a transverse connecting portion t connecting the two fasteners e, and the spacing between the two fasteners e is the span of one fastener e. The fastener e has an outer convex arc surface. The locking slot s includes a plurality of slots f with inner concave arc surfaces that are continuously distributed in a wave shape.

[0032] When assembling, Figure 9-10 As shown, the lock ear 2 is non-rotatably inserted into the inner wall of the tooth sleeve 10, and a through hole opposite to the threaded hole 5 is provided on the cavity wall of the lock ear 2, and the through hole and the threaded hole 5 form a locking channel. The tooth seat 20 is sleeved with the tooth sleeve 10, and the end of the lock pin 1 is in the threaded hole 5. The lock cap 3 is screwed into the threaded hole 5 of the lock ear 2 through the through hole from the outside of the tooth sleeve 10, and the end of the lock pin 1 extends into the lock hole 34 and abuts against the bottom of the hole, and the elastic lock buckle 4 is clamped with the locking card slot s.

[0033] In the above technical solution, the lock cap 3 is connected to the threaded hole 5 by a threaded connection method, and it is connected to the lock ear 2 and is sleeved with the end of the lock pin 1 located on the tooth seat 20. First, the interlocking connection between the lock cap 3 and the end of the lock pin 1 not only realizes radial fixation through sleeve connection, but also limits axial movement through end face abutment, so that the connection point between the tooth sleeve 10 and the tooth seat 20 is multi-fixed and strengthened, so that the connection structure can withstand greater loads and vibrations, and reduce the risk of failure caused by loose connection or damage. Secondly, the threaded connection method has a certain self-locking function, which further limits the circumferential freedom of the lock cap 3 and the end of the lock pin 1, and provides sufficient torque bearing capacity, so that during the use of the excavation tooth, even if there is no cooperation between the elastic lock buckle 4 and the locking slot s, the lock cap 3 is difficult to withdraw outward, and the stability of the connection can be maintained.

[0034] More importantly, in this embodiment, in the final connection state, the end of the lock pin 1 extends into the threaded hole 5, the lock cap 3 is screwed into the threaded hole 5, the threaded portion 30 is located between the end of the lock pin 1 and the wall of the threaded hole 5, and the wall of the threaded hole 5 supports and strengthens the structure, making the connection more stable and firm. The setting of the guide limit groove c not only plays a role in avoiding the end of the lock pin 1 from entering the threaded hole 5, but also the guide limit groove c and the end of the lock pin 1 play a guiding and correcting role in the process of sleeve connection between the tooth sleeve 10 and the tooth seat 20, making the insertion smoother and the positioning more accurate.

[0035] In this embodiment, the cooperation of the two mutually spaced buckles e and the locking card slot s of the wavy multi-slot f not only improves the locking strength, disperses the force, and avoids the separation of the buckle e and the locking card slot s under general torque, but also has more adaptability, improving the convenience and stability of assembly. In addition, when the lock cap 3 and the threaded hole 5 of the tooth sleeve 10 are screwed and tightened, the elastic lock buckle 4 is squeezed by the fastening channel and deformed. This deformation causes the elastic lock buckle 4 to generate a tensioning force on the lock cap 3 and the fastening channel in the radial direction, thereby achieving a tight fit between the lock cap 3 and the fastening channel. The tensioning effect of the elastic lock buckle 4 not only limits the rotation of the lock cap 3 in the circumferential direction, but also enhances the stability of the connection through the radial tensioning force.

[0036] Preferably, as shown in the figure, both sides of the elastic rubber block 41 are provided with concave-convex rib structures y, and the side walls of the groove have corresponding concave-convex rib structures, so that the two can be plugged and embedded.

[0037] like Figure 6As shown, the threaded portion 30 includes a first threaded segment 32 and a second threaded segment 33. The outer diameter of the first threaded segment 32 is greater than the outer diameter of the second threaded segment 33 and the two form a stepped structure. A groove q is provided at the junction of the first threaded segment 32 and the cap head 31, and the elastic lock buckle 4 is located in the groove q. Correspondingly, a stepped structure is also formed between the external threaded segment 51 and the internal threaded segment 52. This design not only improves the axial limiting ability, but also enhances the self-locking performance of the thread.

[0038] like Fig.10 As shown, the end of the locking pin 1 is a truncated cone structure with a diameter gradually expanding from the end surface inward, and the locking hole 34 is a tapered hole with a diameter gradually decreasing from the notch inward. A centering effect will occur between the truncated cone and the tapered hole. During the assembly process, even if there is a certain initial deviation, the truncated cone and the tapered hole can be automatically centered through the guidance of the cone, ensuring the convenience and accuracy of the final connection. When they are tightly matched, the contact area will also be relatively large.

[0039] like Figure 3 , 5 As shown in Figures 10, the outer side of the external threaded section 51 of the base 21 is provided with an outwardly flared tapered hole section w, and the outer peripheral surface of the cap head 31 is a frustum surface h that matches the tapered hole section w. The matching design of the frustum surface h and the tapered hole section w allows the cap head 31 to slide more smoothly along the tapered hole section w during the tightening process until the required locking force is reached. More importantly, this structure allows the force generated during the locking process to be concentrated obliquely inward, which not only increases the locking friction, but also allows the locking force to be more evenly distributed on the connection interface, thereby significantly improving the locking force, enhancing the stability of the connection, reducing the risk of fastener loosening, and extending the service life.

[0040] like Figure 4 , 8 As shown, the outer edge of the base 21 is at a distance from the two opposite ridges 22a of the U-shaped protrusion 22 to form a strip-shaped dowel m structure. Correspondingly, the ear groove 9 inside the gear sleeve 10 for inserting the lock ear 2 is provided with a strip-shaped slot n on the opposite side perpendicular to the setting direction of the lock pin 1. The strip-shaped dowel m and the strip-shaped slot n are inserted up and down to limit the movement of the lock ear 2. In addition to the strip-shaped dowel m and the strip-shaped slot n, the two have realized concave-convex fitting, so that when the gear sleeve 10 is impacted or vibrated, it can more effectively disperse and resist external forces, thereby enhancing the overall impact resistance of the gear sleeve 10.

[0041] like Fig.10As shown, the inner end surface of the lock ear 2 is inclined from the outside to the inside toward the inner end. The ear groove has a matching inclined groove bottom. This contact mode not only increases the contact area, but also makes the contact more uniform, thereby improving the tightness and stability of the connection. During the assembly process, an automatic centering effect will be generated between the lock ear 2 and the ear groove. Even if there is a certain deviation in the initial position, the inclined surface will guide the lock ear 2 to gradually adjust to the correct position to ensure the accuracy of the final connection. This automatic centering effect helps to reduce assembly errors and improve the tightness of the connection.

[0042] The above is an introduction to the locking pin assembly for connecting the excavating teeth provided by the present invention. The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A locking pin assembly for connecting a digging tooth, used to connect a tooth sleeve and a tooth seat, characterized in that: It includes a lock pin, a lock ear and a lock cap; the lock pin is used to be inserted into the gear seat, and the lock ear is used to be fixed on the gear sleeve; The locking cap comprises a cap head at a first end and a threaded portion at a second end; the second end of the locking cap is provided with a locking hole with an axial opening; An elastic lock buckle is provided on one side of the junction between the cap head and the threaded part; the elastic lock buckle comprises an elastic rubber block and a metal fastener partially wrapped in the elastic rubber block; a plurality of buckle portions of the metal fastener protrude outward from the elastic rubber block; The locking ear comprises an outer base and an inner U-shaped protrusion, the locking ear is provided with a threaded hole, the threaded hole comprises an outer thread section and an inner thread section, the outer thread section is located at the base, and the inner thread section is located on the inner wall of the inner end of the U-shaped protrusion; A locking groove is provided on the wall of the threaded hole near the outer side surface; a guide limit groove is formed between two opposite ridges at the outer end of the U-shaped protrusion, and the outer end surface of the locking ear extends to the threaded hole; In the connected state, the end of the locking pin slides along the guide limit groove into the threaded hole, the locking cap is screwed into the threaded hole from the outside of the locking ear, the end of the locking pin extends into the locking hole and abuts against the bottom of the hole, and the elastic lock buckle cooperates with the locking slot to clamp.

2. The locking pin assembly for digging tooth connection according to claim 1, characterized in that: The end of the locking pin is a truncated cone structure with a diameter gradually expanding inward from the end surface, and the locking hole is a tapered hole with a diameter gradually decreasing inward from the notch.

3. The locking pin assembly for digging tooth connection according to claim 1, characterized in that: The threaded portion includes a first thread segment and a second thread segment, the outer diameter of the first thread segment is larger than the outer diameter of the second thread segment and the two form a stepped structure, a groove is provided at the junction of the first thread segment and the cap head, and the elastic lock buckle is located in the groove.

4. The locking pin assembly for digging tooth connection according to claim 1, characterized in that: The metal fastener includes two mutually spaced buckle parts and a transverse connecting part connecting the two buckle parts, and the spacing between the two buckle parts is the span of one buckle part; the buckle part has an outer convex arc surface; the locking slot includes a plurality of slots with inner concave arc surfaces that are continuously distributed in a wave shape.

5. The locking pin assembly for digging tooth connection according to claim 1, characterized in that: The outer edge of the base is a distance away from two opposite ridges of the U-shaped protrusion to form a strip-shaped inserted rib structure.

6. The locking pin assembly for digging tooth connection according to claim 1, characterized in that: The inner end surface of the lock ear is inclined from the outer side to the inner side toward the inner end.

7. The locking pin assembly for digging tooth connection according to claim 1, characterized in that: A tapered hole section is arranged outside the external thread section of the base, and the outer peripheral surface of the cap head is a frustum surface matching the tapered hole section.

8. A locking pin assembly for connecting the excavating teeth, used to connect the tooth sleeve and the tooth seat, characterized in that: It includes a lock pin, a lock ear, and a lock cap; the lock pin is arranged on the gear seat, and the lock ear is used to be fixed on the gear sleeve; The locking cap comprises a cap head at a first end and a threaded portion at a second end; the second end of the locking cap is provided with a locking hole with an axial opening; An elastic lock buckle is provided on one side of the junction between the cap head and the threaded part; the elastic lock buckle comprises an elastic rubber block and a metal fastener partially wrapped in the elastic rubber block; a plurality of buckle portions of the metal fastener protrude outward from the elastic rubber block; The metal fastener comprises two mutually spaced buckle parts and a transverse connecting part connecting the two buckle parts, the distance between the two buckle parts is the span of one buckle part; the buckle part has an outer convex arc surface; The locking ear is provided with a threaded hole, and a locking slot is provided on the hole wall of the threaded hole near the outer side surface; the locking slot includes a plurality of slots with concave arc surfaces that are continuously distributed in a wave shape; In the connected state, the end of the locking pin is in the threaded hole, the locking cap is screwed into the threaded hole from the outside of the locking ear, the end of the locking pin extends into the locking hole and abuts against the bottom of the hole, and the elastic locking buckle is clamped in cooperation with the locking slot.

9. The locking pin assembly for digging tooth connection according to claim 8, characterized in that: The locking ear comprises an outer base and an inner U-shaped protrusion, the threaded hole comprises an outer thread section and an inner thread section, the outer thread section is located at the base, and the inner thread section is located on the inner wall of the inner end of the U-shaped protrusion; A guide limit groove extending from the outer end surface of the lock ear to the threaded hole is formed between two opposite ridges at the outer end of the U-shaped protrusion; in the connected state, the end of the lock pin slides along the guide limit groove into the threaded hole.

10. The locking pin assembly for digging tooth connection according to claim 8, characterized in that: The end of the locking pin is a truncated cone structure with a diameter gradually expanding inward from the end surface, and the locking hole is a tapered hole with a diameter gradually decreasing inward from the notch.

11. The locking pin assembly for digging tooth connection according to claim 9, characterized in that: The outer edge of the base is a distance away from the two opposite ridges of the U-shaped protrusion to form a strip-shaped inserted rib structure; The inner end surface of the lock ear is inclined from the outer side to the inner side toward the inner end.

Images