Secure connection system for fixing wear component of excavation apparatus and assembly method

Abstract

Disclosed in the present invention are a secure connection system for fixing a wear component of an excavation apparatus and an assembly method. The secure connection system comprises a wear component, a lip plate, a backing member and a rotating lock pin, wherein a fitting portion is provided on the backing member or the lip plate, and the fitting portion is provided with a second parallel thread; the rotating lock pin comprises a connection portion which is located on a lower side and provided with a first parallel thread, and a tapered portion which is located on an upper side and has an outer diameter gradually decreasing from top to bottom; the rotating lock pin runs between the backing member and the lip plate, and the connection portion is inserted and screwed in the fitting portion; and the rotating lock pin rotates to axially move, and the tapered portion presses the backing member and the lip plate due to tapered expansion, so as to fix the wear component to the lip plate. By using transmission of the first parallel thread and the second parallel thread, axial movement of the rotating lock pin is achieved, the transmission efficiency is high, and labor is saved on; and on the basis that the tapered portion is tensioned, engagement of the parallel threads can limit axial displacement of the rotating lock pin in a use state due to vertical vibration, thereby ensuring connection stability.

Description

Secure connection system and assembly method for securing wear parts of excavating equipment Technical Field

[0001] The present invention relates to a connection system for wear parts of excavating equipment, and in particular to a stable connection system for wear parts, which can quickly separate and assemble the wear parts from a lip plate body of the excavating equipment. Background Art

[0002] Excavators are commonly used in the engineering and mining industries, and buckets are a crucial component. During excavation operations, excavators frequently collide with rocks and soil, necessitating the installation of wear-resistant components on the front edge.

[0003] The patent document with the authorization announcement number CN211447085U discloses a fixing device for wear-resistant components, including a first fixing component, a second fixing component and an adjustment mechanism. An adjustment groove is provided at the end of the adjustment mechanism, and the fourth threaded portion inserted into the fourth groove has a rod, and the rod extends from the adjustment groove, and the fourth threaded portion can be rotated synchronously by rotating the rod. In actual operation, the operator can use the installation tool to screw the rod at the adjustment groove to rotate the fourth threaded portion, and the fourth threaded portion and the second tooth portion are engaged through the thread to realize the adjustment mechanism to move up and down in the installation direction. This structure has high requirements for thread matching, and the transmission efficiency is relatively low, which is relatively laborious.

[0004] Patent document CN101824835B discloses a releasable coupling assembly comprising a wedge and a barrel lock for releasably securing the separate components of the assembly together. The wedge and barrel are threaded together, allowing the wedge to be driven into and out of an opening in the assembly without hammering or prying. This direct connection between the wedge and barrel eliminates the need for bolts, washers, nuts, or other hardware, thereby reducing the number of parts. However, the buckle and the threads are constantly subject to friction and compression, making them susceptible to wear.

[0005] Summary of the Invention

[0006] In response to the problems in the prior art, this embodiment provides a stable connection system for fixing wear parts of excavating equipment with high transmission efficiency, easy and convenient installation and good stability, and also provides a corresponding assembly method.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a stable connection system for fixing the wear parts of the excavating equipment, including the wear parts, the lip plate body, the front support member, the rear support member and the rotating locking pin;

[0008] The wear part is provided with a connecting groove with a rear opening and a first hole extending up and down;

[0009] The lip plate body is provided with a second hole extending up and down, and the axis direction of the second hole is the same as that of the first hole;

[0010] The front end of the lip plate body extends into the connecting groove; the second hole is located in the first hole to form a hole portion;

[0011] The front support member and the rear support member are located in the hole portion and form a pin channel therebetween;

[0012] The rotary lock pin comprises a connecting portion provided with a first parallel thread and a tapered portion with an outer diameter gradually decreasing from top to bottom;

[0013] A matching portion is provided on the rear side of the front support member, and the matching portion is provided with a second parallel thread;

[0014] The rotary lock pin passes through the hole and is inserted into the pin channel, and the connecting portion is plugged into the matching portion and screwed together;

[0015] The rotary lock pin rotates and moves axially in the pin channel, and the tapered portion squeezes the front and rear members so that the front member abuts forward against the lip plate body and the rear member abuts rearward against the wear component, thereby fixing the wear component on the lip plate body.

[0016] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the front support member includes an upper horizontal arm, a vertical arm, and a lower horizontal arm, the rear end of the upper horizontal arm is connected to the upper end of the vertical arm, and the lower end of the vertical arm is connected to the rear end of the lower horizontal arm, so as to enclose and form a half-frame structure;

[0017] The rear lower section of the vertical arm protrudes backward to form the matching portion, and the rear upper section of the vertical arm is provided with an action surface;

[0018] The vertical arm passes through the second hole, the upper horizontal arm is placed between the upper surface of the lip plate body and the upper groove wall of the connecting groove, and the lower horizontal arm is placed between the lower surface of the lip plate body and the lower groove wall of the connecting groove;

[0019] The tapered portion presses the active surface of the vertical arm, and the front side surface of the vertical arm abuts against the inner wall of the second hole.

[0020] The preferred technical solution adopted by the present invention to solve the above technical problem is: the mating portion is provided with a threaded hole having the second parallel threads; the connecting portion is a cylindrical component, and the first parallel threads are provided on the outer circumference of the cylindrical component;

[0021] Or the matching portion is provided with a cylindrical component, the second parallel thread is provided on the outer circumferential surface of the cylindrical component, and the connecting portion is a threaded hole having the first parallel thread at the lower end of the rotary lock pin.

[0022] The preferred technical solution adopted by the present invention to solve the above technical problems is: a first concave conical surface is provided on the rear side of the front support member; a second concave conical surface is provided on the front side of the rear support member; the taper of the first concave conical surface and the second concave conical surface is consistent with that of the cone portion;

[0023] The outer periphery of the conical portion of the rotary lock pin is distributed with a plurality of longitudinally extending strip-shaped concave grooves, the groove surfaces of which transition to the outer periphery of the conical portion in a circular arc. The second concave conical surface of the backrest member is provided with a protruding elastic lock catch; the head of the elastic lock catch is provided with a tongue bevel to prevent it from rotating in the opposite direction;

[0024] In the first state, the rotary lock pin is subjected to an external circumferential force, and the elastic lock buckle slides along the groove surface and enters the adjacent strip-shaped recessed groove;

[0025] In the second state, the external circumferential force is removed, and the elastic lock buckle is locked in the specific strip-shaped recessed groove to limit the rotation of the rotary lock pin.

[0026] The preferred technical solution adopted by the present invention to solve the above technical problem is: the rear inner wall of the first hole is provided with a first protrusion located on the upper side of the connecting groove and a second protrusion located on the lower side of the connecting groove;

[0027] The backrest member includes a vertical abutment wall and an upper limit wall and a lower limit wall located at the upper and lower ends of the vertical abutment wall;

[0028] The vertical abutting wall abuts against the front end surfaces of the first protrusion and the second protrusion, the upper limit wall is located on the upper side of the first protrusion, and the lower limit wall is located on the lower side of the second protrusion.

[0029] The preferred technical solution adopted by the present invention to solve the above technical problems is: a "7"-shaped component extending out of the first hole is provided at the upper end of the backrest to facilitate the clamping of the tool.

[0030] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the mating portion is provided with a nut seat, and the nut seat is provided with an accommodating cavity; an upper seat wall is provided on the upper side of the accommodating cavity, and a lower seat wall is provided on the lower side of the accommodating cavity;

[0031] A stabilizing nut capable of limited movement is provided in the accommodating cavity, and the stabilizing nut is confined between the upper seat wall and the lower seat wall; or a stabilizing screw capable of limited movement is provided in the accommodating cavity, and the nut of the stabilizing screw is confined between the upper seat wall and the lower seat wall.

[0032] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the front leaning member includes a fixed member on the front side and a first rotating leaning member on the rear side; the rear leaning member includes a second rotating leaning member on the front side and an inserting member on the rear side;

[0033] The rotating lock pin presses the first rotating member and the second rotating member, the first rotating member presses the fixing member, the fixing member presses the lip plate body, the second rotating member presses the insert backward, and the insert presses the wear component backward.

[0034] The preferred technical solution adopted by the present invention to solve the above technical problems is: a stabilizing groove is provided on the rear side of the wear part; stabilizing blocks are fixed on the upper and lower sides of the lip plate body respectively;

[0035] The stabilizing block is embedded in the stabilizing groove to stabilize the wear component.

[0036] Another technical solution adopted by the present invention to solve the above technical problem is: a stable connection system for fixing the wear part of the excavating equipment, including the wear part, the lip plate, the backrest and the rotating locking pin;

[0037] The wear component is provided with a connecting groove with a rear opening and a first mounting hole extending up and down;

[0038] The lip plate is provided with a second mounting hole extending up and down, and the axis direction of the second mounting hole is the same as that of the first mounting hole;

[0039] The front end of the lip plate extends into the connecting groove; the second mounting hole is located inside the first mounting hole;

[0040] The backrest member passes through the first mounting hole and the second mounting hole, and the backrest member or the lip plate is provided with a matching portion located at the lower side of the second mounting hole, and the matching portion is provided with a second parallel thread;

[0041] The rotary lock pin includes a connecting portion provided with a first parallel thread on the lower side and a tapered portion on the upper side with an outer diameter gradually decreasing from top to bottom;

[0042] A first inclined surface is provided on the side of the second mounting hole of the lip plate opposite to the backrest member; a second inclined surface is provided on the front side of the backrest member; the inclinations of the first inclined surface and the second inclined surface are consistent with those of the tapered portion;

[0043] The rotary lock pin passes through the first mounting hole and the second mounting hole and is inserted between the backrest member and the lip plate, and the connecting portion is plugged into the matching portion and screwed;

[0044] The rotary lock pin rotates and moves axially, and the tapered portion squeezes the backrest and the lip plate due to the tapered expansion, thereby fixing the wear component on the lip plate.

[0045] Another preferred technical solution adopted by the present invention to solve the above technical problem is: a first protrusion located on the upper side of the connecting groove and a second protrusion located on the lower side of the connecting groove are provided on the rear inner wall of the first mounting hole;

[0046] The backrest member includes a vertical abutment wall and an upper limit wall and a lower limit wall located at the upper and lower ends of the vertical abutment wall;

[0047] The vertical abutting wall abuts against the front end surfaces of the first protrusion and the second protrusion, the upper limit wall is located on the upper side of the first protrusion, and the lower limit wall is located on the lower side of the second protrusion.

[0048] Another technical solution adopted by the present invention to solve the above technical problem is preferably: a first concave conical surface is provided on the side of the second mounting hole of the lip plate opposite to the backrest member; a second concave conical surface is provided on the front side of the backrest member; the tapers of the first concave conical surface and the second concave conical surface are consistent with those of the tapered portion;

[0049] The outer periphery of the conical portion of the rotary lock pin is distributed with a plurality of longitudinally extending strip-shaped concave grooves, the groove surfaces of which transition to the outer periphery of the conical portion in a circular arc. The second concave conical surface of the backrest member is provided with a protruding elastic lock catch; the head of the elastic lock catch is provided with a tongue bevel to prevent it from rotating in the opposite direction;

[0050] In the first state, the rotary lock pin is subjected to an external circumferential force, and the elastic lock buckle slides along the groove surface and enters the adjacent strip-shaped recessed groove;

[0051] In the second state, the external circumferential force is removed, and the elastic lock buckle is locked in the specific strip-shaped recessed groove to limit the rotation of the rotary lock pin.

[0052] Another preferred technical solution adopted by the present invention to solve the above technical problem is: the lip plate includes a lip plate body and a front leaning member, and the lip plate body is provided with a second hole;

[0053] The front leaning member passes through the second hole and leans against the lip plate body;

[0054] A pin channel for the rotary lock pin to pass through is formed between the front leaning member and the rear leaning member;

[0055] The rotary lock pin is rotated to expand the front and rear leaning members outward, thereby achieving the fixation of the wear component and the lip plate body.

[0056] Another preferred technical solution adopted by the present invention to solve the above technical problem is: the mating portion is provided with a threaded hole having the second parallel threads; the connecting portion is a cylindrical component, and the first parallel threads are provided on the outer circumference of the cylindrical component;

[0057] Or the matching portion is provided with a cylindrical component, the second parallel thread is provided on the outer circumferential surface of the cylindrical component, and the connecting portion is a threaded hole having the first parallel thread at the lower end of the rotary lock pin.

[0058] Another preferred technical solution adopted by the present invention to solve the above technical problem is: the mating portion is provided with a nut seat, the nut seat is provided with an accommodating cavity; the upper side of the accommodating cavity is provided with an upper seat wall, and the lower side of the accommodating cavity is provided with a lower seat wall;

[0059] A stabilizing nut with limited movement is provided in the accommodating cavity, the second parallel thread is arranged in the screw hole of the stabilizing nut, and the stabilizing nut is confined between the upper seat wall and the lower seat wall; or a stabilizing screw with limited movement is provided in the accommodating cavity, the second parallel thread is arranged on the screw rod of the stabilizing screw, and the nut of the stabilizing screw is confined between the upper seat wall and the lower seat wall.

[0060] Another preferred technical solution adopted by the present invention to solve the above technical problem is: the front support member includes an upper horizontal arm, a vertical arm, and a lower horizontal arm, the rear end of the upper horizontal arm is connected to the upper end of the vertical arm, and the lower end of the vertical arm is connected to the rear end of the lower horizontal arm to enclose and form a half-frame structure;

[0061] The lower rear section of the vertical arm protrudes backward to form the matching portion, and the upper rear section of the vertical arm is provided with an action surface squeezed by the cone portion;

[0062] The vertical arm passes through the second mounting hole, the upper transverse arm is placed between the upper surface of the lip plate body and the upper groove wall of the connecting groove, and the lower transverse arm is placed between the lower surface of the lip plate body and the lower groove wall of the connecting groove;

[0063] The interior of the wear component is respectively provided with an upper concave portion adapted to the upper cross arm and a lower concave portion adapted to the lower cross arm, and the upper cross arm, the lower cross arm and the wear component have a matching clearance;

[0064] A first concave portion is provided at the front corners of the upper horizontal arm and the vertical arm, and at the front corners of the lower horizontal arm and the vertical arm.

[0065] Another preferred technical solution adopted by the present invention to solve the above technical problem is: the wear member is U-shaped, including an upper branch and a lower branch, and the connecting groove is formed between the upper branch and the lower branch;

[0066] The rear sides of the upper branch and the lower branch are provided with stabilizing grooves; the upper and lower sides of the lip plate are respectively fixed with stabilizing blocks;

[0067] The stabilizing block is embedded in the stabilizing groove to stabilize the wear component.

[0068] Another technical solution adopted by the present invention to solve the above technical problem is: an assembly method of a stable connection system for fixing wear parts of excavating equipment: the assembly objects include the wear parts, the lip plate, the backrest member and the rotating lock pin;

[0069] The wear part is provided with a connecting groove with a rear opening and a first mounting hole extending vertically, and the lip plate is provided with a second mounting hole extending vertically;

[0070] The rotary lock pin includes a connecting portion located at the lower side and provided with a first parallel thread and a tapered portion with an outer diameter gradually decreasing from top to bottom;

[0071] The backrest or the lip plate is provided with a matching portion, the matching portion is provided with a fine-tuning component with limited movement, and the fine-tuning component is provided with a second parallel thread matching the first parallel thread;

[0072] A plurality of longitudinally extending strip-shaped recessed grooves are distributed on the outer periphery of the tapered portion of the rotary lock pin, and a protruding elastic lock buckle is provided on the front side of the backrest member;

[0073] The assembly steps include:

[0074] Step S1: inserting the front end of the lip plate into the connecting groove, with the second mounting hole located inside the first mounting hole;

[0075] Step S2: the backrest member passes through the first mounting hole and the second mounting hole, the backrest member is located at the rear portion of the first mounting hole and the second mounting hole, a pin channel is formed between the backrest member and the hole wall of the second mounting hole of the lip plate, and the mating portion is located at the lower portion of the pin channel;

[0076] Step S3: The rotary lock pin passes through the first mounting hole and the second mounting hole with the connecting portion at the bottom and is inserted into the pin channel, and the connecting portion and the fine-tuning member of the matching portion are adaptively plugged in and screwed together;

[0077] Step S4: the rotating lock pin rotates and moves axially, the tapered portion squeezes the backrest and the lip plate due to the tapered expansion, the elastic lock buckle enters the strip-shaped recessed groove and switches between different strip-shaped recessed grooves as it rotates; the wear part is fixed on the lip plate.

[0078] Another preferred technical solution adopted by the present invention to solve the above technical problem is: in the assembly object thereof, the lip plate includes a lip plate body and a front leaning member, and the lip plate body is provided with a second hole;

[0079] The front support member includes an upper horizontal arm, a vertical arm, and a lower horizontal arm, wherein the rear end of the upper horizontal arm is connected to the upper end of the vertical arm, and the lower end of the vertical arm is connected to the rear end of the lower horizontal arm to enclose and form a half frame structure;

[0080] The rear lower section of the vertical arm is convex backward to form the matching portion, and the rear upper section of the vertical arm is provided with an action surface, which is a first concave cone surface;

[0081] The rear inner wall of the first mounting hole is provided with a first protrusion located on the upper side of the connecting groove and a second protrusion located on the lower side of the connecting groove;

[0082] The backrest member includes a vertical abutting wall and an upper limit wall and a lower limit wall located at the upper and lower ends of the vertical abutting wall, and the front side surface of the vertical abutting wall is a second concave cone surface;

[0083] In the assembly steps, step S0 is included before step S1;

[0084] In step S0, the vertical arm of the front leaning member passes through the second hole, the upper horizontal arm is placed on the upper side of the lip plate body, the lower horizontal arm is placed on the lower side of the lip plate body, and the front side surface of the vertical arm abuts against the inner wall of the second hole. The front leaning member and the lip plate body together form the lip plate;

[0085] In step S2, the vertical abutment wall abuts against the front end surfaces of the first protrusion and the second protrusion, the upper limit wall is located on the upper side of the first protrusion, and the lower limit wall is located on the lower side of the second protrusion; the pin channel is formed between the first concave conical surface of the vertical arm and the second concave conical surface of the vertical abutment wall.

[0086] Another preferred technical solution adopted by the present invention to solve the above technical problem is: in the assembled object, a stabilizing groove is provided on the rear side of the wear part; the bottom surface of the stabilizing groove is a first mating inclined surface that is inclined from the rear to the front and approaches the connecting groove, and the side surface of the stabilizing groove is a second mating inclined surface that gradually expands outward toward the lip plate; and stabilizing blocks are provided on the upper and lower sides of the lip plate respectively;

[0087] In the assembly steps, the stabilizing block is pre-fixed on the lip plate before step S1, and when the lip plate is inserted into the connecting groove, the stabilizing block is embedded in the stabilizing groove; or the stabilizing block is inserted into the stabilizing groove after step S4 and then fixed to the lip plate.

[0088] Compared with the prior art, the advantages of the present invention are:

[0089] The first and second parallel threads are used to transmit the axial movement of the rotary lock pin, resulting in high transmission efficiency. Furthermore, the engagement of the first and second parallel threads, while tightening the tapered portion, can limit axial displacement of the rotary lock pin due to vertical vibration during use, thereby ensuring connection stability.

[0090] In the preferred embodiment, the fine-tuning component has a certain degree of mobility in the nut seat, which includes slight movements in the horizontal and vertical directions, so that it can adaptively find the position when the rotary lock pin is screwed downward to make the threads fit, and can also adaptively fine-tune the relative position after the corresponding components are stretched and displaced, thereby ensuring the adaptability and stability of the threaded connection.

[0091] In the preferred embodiment, the first and second concave conical surfaces wrap around the outer periphery of the tapered portion of the rotary lock pin, enhancing connection stability. The combination of the strip-shaped recessed groove and the elastic lock catch further restricts circumferential rotation of the backrest and the rotary lock pin in the absence of external circumferential rotational forces, preventing loosening of the rotary lock pin and enhancing the secure connection of the wearable component. Furthermore, the beveled tongue surface on the head of the elastic lock catch prevents reverse rotation of the rotary lock pin, reducing loosening during use and further enhancing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0093] FIG1 is a schematic diagram of a wear component in a first embodiment of the present invention;

[0094] FIG2 is a second schematic diagram of a wear component in the first embodiment of the present invention;

[0095] FIG3 is a schematic diagram of the lip plate body in Example 1 of the present invention;

[0096] FIG4 is a schematic structural diagram of the lip plate in Example 1 of the present invention;

[0097] FIG5 is a schematic cross-sectional view of the lip plate in Example 1 of the present invention;

[0098] FIG6 is a schematic diagram of a wear member and a lip plate in Example 1 of the present invention;

[0099] FIG7 is a schematic diagram of the rear support member in the inserted state according to the first embodiment of the present invention;

[0100] FIG8 is a cross-sectional view of the rear support member in the inserted state according to the first embodiment of the present invention;

[0101] FIG9 is an overall schematic diagram of the rear support member after insertion in the first embodiment of the present invention;

[0102] 10 is a diagram of the internal structure of the back member after insertion in Example 1 of the present invention;

[0103] FIG11 is a cross-sectional view of the rear support member after insertion in the first embodiment of the present invention;

[0104] FIG12 is a schematic diagram of the rotary lock pin in the inserted state according to the first embodiment of the present invention;

[0105] FIG13 is a schematic diagram of a stable connection system after the rotary lock pin is screwed in the first embodiment of the present invention;

[0106] FIG14 is an internal view of the stable connection system after the rotary lock pin is screwed in the first embodiment of the present invention;

[0107] FIG15 is a diagram of the internal components of the first embodiment of the present invention after the rotary lock pin is screwed;

[0108] FIG16 is a structural diagram of a stable connection system after the stabilizing block is inserted in the first embodiment of the present invention;

[0109] FIG17 is a cross-sectional view of the stable connection system after the stabilizing block is inserted in the first embodiment of the present invention;

[0110] FIG18 is a schematic diagram of the structure of the front support member in the first embodiment of the present invention;

[0111] FIG19 is a schematic structural diagram of a rotary lock pin in Embodiment 1 of the present invention;

[0112] FIG20 is a schematic diagram of the cooperation between the rotary lock pin and the backrest member in the first embodiment of the present invention;

[0113] FIG21 is a schematic diagram of the structure of the backrest member in the first embodiment of the present invention;

[0114] FIG22 is a schematic structural diagram of the elastic lock buckle in Example 1 of the present invention;

[0115] FIG23 is a first schematic diagram of the cooperation between the strip-shaped recessed groove and the elastic lock buckle in the first embodiment of the present invention;

[0116] FIG24 is a second schematic diagram of the cooperation between the strip-shaped recessed groove and the elastic lock buckle in the first embodiment of the present invention;

[0117] FIG25 is a schematic structural diagram of a stabilizing block in Embodiment 1 of the present invention;

[0118] FIG26 is a schematic structural diagram of a stable connection system according to a second embodiment of the present invention;

[0119] FIG27 is a schematic structural diagram of a stable connection system in a third embodiment of the present invention;

[0120] FIG28 is an exploded schematic diagram of a stable connection system according to a fourth embodiment of the present invention;

[0121] FIG29 is a schematic structural diagram of a rotary lock pin in a fourth embodiment of the present invention;

[0122] FIG30 is a schematic structural diagram of the matching portion in the fourth embodiment of the present invention.

[0123] Reference numerals: Wearing part 100; lip plate 200; rear support member 300; rotary lock pin 400; connecting groove 1; tooth tip 101; connecting body 102; first hole q1; lip plate body 201; front support member 202; pin channel 2; matching portion 3; connecting portion 4; tapered portion 5; screwing portion 9; first protrusion 6; second protrusion 7; vertical abutment wall 301; upper limit wall 302; lower limit wall 303; second inner recess r1; first inner recess r2; first concave conical surface p1; second concave conical surface p2; upper cross arm 21; vertical arm 22; lower cross arm 23; upper groove wall m1; lower groove wall m2; upper edge x1; lower edge x2; upper recess m11; lower recess m12; first parallel thread y1; second parallel thread y2; "7"-shaped member t; Strip-shaped recessed groove 51; elastic locking buckle 52; elastic member 521; metal locking portion 522; groove F; tongue bevel e; nut seat 31; accommodating chamber c; upper seat wall c1; lower seat wall c2; stabilizing nut 8; annular lower end surface n; upper branch 1011; lower branch 1012; stabilizing groove 10; stabilizing block 11; first mating bevel g1; second mating bevel g2; third mating bevel g3; fourth mating bevel g4; small-size portion 111; large-size portion 112; fixing member 202a; first rotating support member 202b; second rotating support member 300a; insert 300b; extending protrusion z; stabilizing screw 8'; nut 81; screw rod 82. DETAILED DESCRIPTION

[0124] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0125] In the description of the present invention, it should be noted that the terms "upper," "lower," "front," "back," "inner," "outer," and so forth, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate description and simplify the present invention, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Terms such as "first" and "second," etc., are used solely for ease of understanding and have no other directional meanings, and should not be construed as limitations on the present invention.

[0126] Example 1

[0127] As shown in Figures 1-25, this embodiment provides a secure connection system for securing wear components of excavating equipment.

[0128] As shown in FIGS. 13-17 , the secure connection system includes a wear member 100 , a lip plate 200 , a back member 300 , and a rotation locking pin 400 .

[0129] The wear part 100 is the front edge of the excavation operation and is the part that directly interacts with the excavated material. Therefore, it needs to be firmly connected to the main equipment during use and easy to disassemble and assemble when replaced. Therefore, high requirements are placed on its connection system.

[0130] As shown in Figures 1-2, the wear component 100 has a rear-open connection groove 1, which is used to insert the lip plate 200 of the device into and achieve a socketed connection between the two. The wear component 100 comprises a solid tooth tip 101 at the front and a connector body 102 at the rear, which has a connection groove 1 open axially and facing rearward. Connector body 102 also has a first hole q1 extending vertically. This first hole q1 extends through the connection groove 1 to form a first mounting hole.

[0131] As shown in FIG3-5 , the lip plate 200 includes a lip plate body 201 and a front support member 202 . The lip plate body 201 is provided with a second hole q2 . The second hole q2 has the same axial direction as the first hole q1 .

[0132] As shown in Figures 3-5, the front support member 202 passes through the second hole q2 in the lip plate body 201 and rests on the lip plate body 201. The front support member 202 and the lip plate body 201 can be an integral structure or pre-attached by welding or other means to form the lip plate 200. They can also be separate structures, with the front support member 202 abutting against the front section of the lip plate body 201. After the lip plate body 201 and the front support member 202 are combined, the second hole q2 is partially occupied to form a second mounting hole.

[0133] As shown in Figures 3-8, the front end of the lip plate body 201 extends into the connecting groove 1. The second hole q2 is located within the first hole q1 to form a hole portion. That is, the longitudinal space of the first hole q1 is larger than the longitudinal space of the second hole q2, forming a longitudinal hole-in-hole structure.

[0134] As shown in Figures 7-11, the rear support member 300 passes through the first and second mounting holes and is positioned behind them, ultimately resting against the rear wall of the first mounting hole. A pin channel 2 is formed between the front support member 202 and the rear support member 300, through which the rotary lock pin 400 passes. Specifically, a pin channel 2 is formed between the rear support member 300 and the front inner wall of the second mounting hole.

[0135] As shown in Figures 7-11, in this embodiment, the lower end of the front support member 202 is provided with a matching portion 3 located at the lower side of the second mounting hole. The matching portion 3 is located at the lower side of the pin channel 2 and is used to match with the lower end of the rotating lock pin 400.

[0136] As shown in FIG. 19 , the rotary locking pin 400 includes a connecting portion 4 provided with a first parallel thread y1 and a tapered portion 5 whose outer diameter gradually decreases from top to bottom.

[0137] As shown in Figures 8, 10 and 18, the matching portion 3 is provided with a second parallel thread y2. The first parallel thread y1 and the second parallel thread y2 are internal and external thread structures that match each other.

[0138] As shown in FIG11 , the rear side of the front support member 202 is provided with a first inclined surface; the front side of the rear support member 300 is provided with a second inclined surface; the inclinations of the first inclined surface and the second inclined surface are consistent with the conical portion 5;

[0139] As shown in Figures 9-17, the rotary lock pin 400 passes through the hole formed by the first and second holes q1 and q2 and is inserted into the pin channel 2. The connecting portion 4 is plugged into and threaded into the mating portion 3. As the rotary lock pin 400 rotates, it moves axially. Due to the expansion of the taper, the tapered portion 5 presses against the front support member 202 and the rear support member 300, forcing the front support member 202 forward against the lip plate body 201 and the rear support member 300 rearward against the wear member 100. The wear member 100 and the lip plate body 201 are subjected to opposing lateral forces, causing them to expand against each other, thereby securing the wear member 100 and the lip plate body 201.

[0140] The first parallel thread y1 and the second parallel thread y2 not only convert the rotational motion of the rotary lock pin 400 into linear motion so that the rotary lock pin 400 can tighten the wearing part 100 and the lip plate 200, but also the engagement of the first parallel thread y1 and the second parallel thread y2 can limit the axial displacement of the rotary lock pin 400 due to up and down vibration in the use state, thereby ensuring the stability of the connection.

[0141] As shown in Figure 11, the rear inner wall of the first hole q1 is further provided with a first protrusion 6 located on the upper side of the connecting groove 1 and a second protrusion 7 located on the lower side of the connecting groove 1. The rear support member 300 includes a vertical abutment wall 301 and an upper limit wall 302 and a lower limit wall 303 located at the upper and lower ends of the vertical abutment wall 301.

[0142] In the connected state, the vertical abutment wall 301 abuts against the front ends of the first and second protrusions 6 and 7, the upper limit wall 302 is located above the first protrusion 6, and the lower limit wall 303 is located below the second protrusion 7. The upper and lower limit walls 302 and 303 restrict the vertical movement of the rear support member 300, thereby limiting the vertical position of the wear component 100 and the lip plate 200 relative to each other, thus preventing displacement of the wear component 100 and the lip plate 200 in the connected state and further enhancing the security of the connection.

[0143] Preferably, as shown in Figures 7, 8, and 12, second recessed portions r1 are provided at the rear corners of the vertical abutment wall 301 and the upper limiting wall 302, and at the rear corners of the vertical abutment wall 301 and the lower limiting wall 303. The provision of the second recessed portions r1 not only provides more clearance space to facilitate insertion of the backrest member 300 into the hole portion formed by the first hole q1 and the second hole q2, but also prevents the backrest member 300 from colliding with the upper edge x1 and the lower edge x2 of the first protrusion 6 and the second protrusion 7.

[0144] As shown in Figures 5 and 18, the front support member 202 includes an upper horizontal arm 21, a vertical arm 22, and a lower horizontal arm 23. The rear end of the upper horizontal arm 21 is connected to the upper end of the vertical arm 22, and the lower end of the vertical arm 22 is connected to the rear end of the lower horizontal arm 23, thereby forming a half-frame structure. The rear lower section of the vertical arm 22 protrudes rearward to form a mating portion 3, and the rear upper section of the vertical arm 22 is provided with an active surface.

[0145] As shown in Figures 1, 5, 7, and 8, the vertical arm 22 passes through the second hole q2, the upper cross arm 21 is positioned between the upper surface of the lip plate body 201 and the upper groove wall m1 of the connecting groove 1, and the lower cross arm 23 is positioned between the lower surface of the lip plate body 201 and the lower groove wall m2 of the connecting groove 1. The tapered portion 5 presses against the active surface of the vertical arm 22, and the front side of the vertical arm 22 abuts against the inner wall of the second hole q2.

[0146] In the case where the front support member 202 and the lip plate body 201 are independent components, whether the two are connected by a connection structure such as welding, or the front support member 202 is placed on the lip plate body 201 without being physically connected and fixed, but using the squeezing force of the subsequent rotating lock pin 400 to achieve friction, the front support member 202 is configured in the above-mentioned semi-frame structure to limit its displacement in the vertical direction of the lip plate body 201, further enhancing the overall security of the connection. Preferably, in this embodiment, the front support member 202 is pre-fixed to the lip plate body 201 by welding.

[0147] As shown in FIG1 , the interior of the wear component 100 is provided with an upper recessed portion m11 adapted to the upper cross arm 21 and a lower recessed portion m12 adapted to the lower cross arm 23 , and the upper cross arm 21 , the lower cross arm 23 and the wear component 100 have a fitting clearance, so no interference occurs during installation and use.

[0148] As shown in FIG5 , first inner recesses r2 are provided at the front corners of the upper horizontal arm 21 and the vertical arm 22, and at the front corners of the lower horizontal arm and the vertical arm 22. The provision of the first inner recess r2 not only provides more avoidance space, which facilitates the insertion of the front support member 202 into the second hole q2, but also prevents the front support member 202 from colliding with the outer edge of the second hole q2 of the lip plate body 201 during use, thereby preventing stress interference between the two.

[0149] As shown in Figures 5, 8, 10, and 18, more preferably, the first inclined surface on the rear side of the front support member 202 is a first concave conical surface p1. This first concave conical surface p1 serves as the active surface. The second inclined surface on the front side of the rear support member 300 is a second concave conical surface p2. The taper of the first and second concave conical surfaces p1 and p2 is consistent with that of the tapered portion 5. The first and second concave conical surfaces p1 and p2 surround the outer periphery of the tapered portion 5 of the rotary lock pin 400, thereby improving the connection stability.

[0150] As shown in Figures 14-15 and 19-22, an anti-loosening locking mechanism is provided between the conical portion 5 of the rotary lock pin 400 and the rear support member 300. Specifically, a plurality of strip-shaped recessed grooves 51 extending longitudinally are distributed on the periphery of the conical portion 5 of the rotary lock pin 400. The groove surface of the strip-shaped recessed groove 51 transitions to the circular arc of the outer peripheral surface of the conical portion 5, and a protruding elastic lock buckle 52 is provided on the second concave conical surface p2 of the rear support member 300.

[0151] In the first state, the rotary lock pin 400 is subjected to an external circumferential force, and the elastic lock buckle 52 slides along the groove surface and enters the adjacent strip-shaped recessed groove 51 .

[0152] In the second state, the external circumferential force is removed, and the elastic lock buckle 52 is locked in the specific strip-shaped recessed groove 51 to limit the rotation of the rotary lock pin 400.

[0153] The cooperation between the strip-shaped recessed groove 51 and the elastic lock buckle 52 further limits the circumferential rotation of the rear member 300 and the rotary lock pin 400 in the absence of an external circumferential rotational force, thereby preventing the rotary lock pin 400 from loosening and improving the firmness of the connection of the wear part 100.

[0154] As shown in Figures 22-24, the head of the elastic lock catch 52 forms a horizontally inclined tongue slope e. When tightened, the rotating lock pin 400 rotates clockwise, and the elastic lock catch 52 is easily pressed into the strip-shaped recessed groove 51 due to its elastic action. During reversal, the tongue slope e compresses the expansion joint to a larger space, thus preventing the rotating lock pin 400 from reversing and reducing loosening during use.

[0155] As shown in Figure 21, the second concave conical surface p2 of the backrest 300 is provided with a groove F. The elastic lock 52 includes an elastic member 521 and a metal lock portion 522. The elastic member 521 is positioned within the groove F, while the metal lock portion 522 is positioned outside the elastic member 521, thereby achieving elastic expansion and contraction. Furthermore, the metal lock portion 522 is a wear-resistant component, while the elastic member 521 is a rubber member.

[0156] As shown in Figures 15, 17-18, the mating portion 3 is provided with a nut seat 31, which has an accommodating cavity c, within which a stabilizing nut 8 is mounted. The stabilizing nut 8 has a certain degree of mobility within the nut seat 31, including slight horizontal and vertical movement, making the stabilizing nut 8 a fine-tuning member with limited movement. This allows the stabilizing nut 8 to adaptively locate its position to ensure threaded engagement when the rotary lock pin 400 is rotated downward for insertion. Furthermore, the stabilizing nut 8 can adaptively fine-tune its relative position after the front support member 202 is expanded and displaced, thereby ensuring the adaptability and stability of the threaded connection.

[0157] 17-18 , an upper seat wall c1 is provided on the upper side of the accommodating chamber c, and a lower seat wall c2 is provided on the lower side of the accommodating chamber c. The upper seat wall c1 and the lower seat wall c2 are respectively provided with through holes, and the second parallel thread y2 is provided in the threaded hole of the stabilizing nut 8.

[0158] The connecting portion 4 is a cylindrical member with a first parallel thread y1 formed on its outer circumference. The connecting portion 4 sequentially passes through the upper seat wall c1, the stabilizing nut 8, and the lower seat wall c2. The upper and lower seat walls c1 and c2 not only prevent the stabilizing nut 8 from disengaging from the mating portion 3, but also guide the front support member 202 and the rotating lock pin 400 relative to each other.

[0159] Preferably, in the connected state, the connecting portion 4 passes through the through hole of the lower seat wall c2, and the annular lower end surface n of the cone 5 abuts against the upper seat wall c1, forming a downward restriction to prevent the structure from being too tight and inconvenient to disassemble.

[0160] As shown in Figures 9, 11, and 12, the upper end of the backrest 300 is preferably provided with a "7"-shaped member t extending from the first hole q1 to facilitate tool gripping. The upper end surface of the rotary lock pin 400 is provided with a tool-operated screwing portion 9. For example, in this embodiment, the screwing portion 9 is a square hole structure, which can be inserted and screwed using a screwing tool with a square cross-section.

[0161] As shown in Figures 1-2 and 16, the connector 102 of the wear component 100 is U-shaped and includes an upper branch 1011 and a lower branch 1012. A connecting groove 1 is formed between the upper and lower branches 1011, 1012. The first hole q1 comprises an upper hole in the upper branch 1011 and a lower hole in the lower branch 1012. Stabilizing grooves 10 are provided behind the upper and lower branches 1011, 1012. Stabilizing blocks 11 are fixed to the upper and lower sides of the lip plate 200. These blocks 11 are embedded in the stabilizing grooves 10 to stabilize the wear component 100.

[0162] As shown in Figures 2 and 16, the bottom surface of the stabilizing groove 10 is a first matching inclined surface g1, and the groove side surfaces on both sides of the width are second matching inclined surfaces g2 that gradually expand outward toward the lip plate 200, so that the cross section of the stabilizing groove 10 is trapezoidal.

[0163] As shown in Figures 2, 16, 17, and 25, the stabilizing block 11 mates with the stabilizing groove 10. It comprises a small portion 111 that fits into the stabilizing groove 10 and a large portion 112 positioned at the rear end of the wear component 100. The front side of the small portion 111 defines a third mating bevel g3 that mates with the first mating bevel g1. The sides of the small portion 111 define fourth mating bevels g4 that mate with the second mating bevel g2. The beveled surfaces of the stabilizing groove 10 and the stabilizing block 11 minimize assembly clearance, thereby enhancing the stability of the connection between the wear component 100 and the lip plate 200. Preferably, the stabilizing block 11 is secured to the lip plate 200 by welding.

[0164] The assembly method of the stable connection system for fixing the wear part 100 of the excavating equipment of this embodiment includes:

[0165] Step S0: As shown in Figure 3-5, the front support member 202 passes through the second hole q2 and is connected to the lip plate body 201. The front support member 202 is close to the front side of the inner wall of the second hole q2. The front support member 202 and the lip plate body 201 form the lip plate 200, and the second hole q2 is occupied by the front support member 202 to form a second mounting hole.

[0166] Specifically, the vertical arm 22 of the front support member 202 passes through the second hole q2, the upper horizontal arm 22 is placed on the upper side of the lip plate body 201, and the lower horizontal arm 23 is placed on the lower side of the lip plate body 201. The front side surface of the vertical arm 22 rests on the inner wall of the second hole q2, and the front support member 202 and the lip plate body 201 together form the lip plate 200.

[0167] Step S1: As shown in FIG6 , the front end of the lip plate 200 extends into the connecting groove 1 , and the second mounting hole enters the projection range of the first hole q1 . The first hole q1 is the first mounting hole, and the second mounting hole is located inside the first mounting hole.

[0168] Step S2: As shown in Figure 7-11, the rear support member 300 passes through the first mounting hole and the second mounting hole, and the rear support member 300 is located at the rear part of the first mounting hole and the second mounting hole. The vertical abutment wall 301 abuts the front end surface of the first protrusion 6 and the second protrusion 7. The upper limit wall 302 is located on the upper side of the first protrusion 6, and the lower limit wall 303 is located on the lower side of the second protrusion 7; a pin channel 2 is formed between the first concave cone surface p1 of the vertical arm 22 and the second concave cone surface p2 of the vertical abutment wall 301, and the mating part 3 is located at the lower part of the pin channel 2.

[0169] Step S3: As shown in FIG12 , the rotating locking pin 400 passes through the first mounting hole and the second mounting hole with the connecting portion 4 at the bottom and is inserted into the pin channel 2 . The connecting portion 4 and the stabilizing nut 8 of the mating portion 3 are adaptively plugged in and threaded.

[0170] Step S4: As shown in Figures 13-17, the rotary lock pin 400 rotates and moves axially, and the conical portion 5 squeezes the rear support member 300 and the lip plate 200 due to the tapered expansion. The elastic lock buckle 52 enters the strip-shaped recessed groove 51 and switches between different strip-shaped recessed grooves 51 as it rotates; the wear part 100 is fixed on the lip plate 200.

[0171] Step S5 : The stabilizing block 11 is inserted into the stabilizing groove 10 and then fixed to the lip plate 200 to further strengthen the connection between the wear part 100 and the lip plate 200 .

[0172] Of course, the stabilizing block 11 can also be pre-fixed to the lip plate 200 before step S1. When the lip plate 200 is inserted into the connecting groove 1, the stabilizing block 11 is embedded in the stabilizing groove 10. In this case, there is no need for a separate step S5. After step S4, the stabilizing block 11 and the stabilizing groove 10 are finally matched.

[0173] Example 2

[0174] This embodiment improves upon the structure of the lip plate 200 and backrest 300 in the first embodiment. The following describes the differences between the two embodiments and briefly describes the similarities. Those skilled in the art will be able to combine this embodiment with the first embodiment to fully demonstrate the structure presented in the first embodiment.

[0175] As shown in FIG. 26 , this embodiment provides a secure connection system for fixing a wear component of an excavating device, including a wear component 100 , a lip plate 200 , a backrest 300 , and a rotary locking pin 400 .

[0176] In this embodiment, the lip plate 200 is an integrated structure, and there is no independent front support member as in the first embodiment.

[0177] As shown in Figure 26, the wear component 100 has a connecting groove 1, which is open at the rear. This groove 1 is used to insert the lip plate 200 of the device into the wear component 100, achieving a socket connection between the two. The wear component 100 comprises a solid tooth tip 101 at the front and a connecting body 102 at the rear, which has a connecting groove 1 that opens axially and rearward. The connecting body 102 also has a first hole q1 extending vertically. The first hole q1 passes through the connecting groove 1.

[0178] As shown in Figure 26, the structure of the lip plate 200 is compatible with the connection groove 1, allowing it to extend into the connection groove 1. The lip plate 200 also has a second hole q2 extending vertically, with the second hole q2 oriented in the same axial direction as the first hole q1. When the front end of the lip plate 200 extends into the connection groove 1, the second hole q2 is located within the first hole q1. That is, the longitudinal space between the first hole q1 is larger than that between the second hole q2, forming a longitudinal hole-within-a-hole structure.

[0179] The backrest member 300 passes through the first hole q1 and the second hole q2 and is located behind the first hole q1 and the second hole q2, and will eventually be pressed against the hole wall behind the first hole q1. A pin channel 2 is formed between the front side of the backrest member 300 and the inner wall of the second hole q2 not blocked by the backrest member 300.

[0180] In this embodiment, the lower end of the backrest 300 is provided with a matching portion 3 located below the second hole q2 . The matching portion 3 is located below the pin channel 2 and is used to match with the lower end of the rotary lock pin 400 .

[0181] The structure of the rotary lock pin 400 is the same as that of the first embodiment, comprising a connecting portion 4 with a first parallel thread y1 and a tapered portion 5 with an outer diameter gradually decreasing from top to bottom. The connecting portion 4 is a cylindrical component, and the first parallel thread y1 is an external thread on its outer circumference.

[0182] The specific structure of the matching portion 3 refers to that of the first embodiment. The stabilizing nut 8 is provided through the accommodating cavity c of the nut seat 31 , and the threaded hole wall of the stabilizing nut 8 is provided with a second parallel thread.

[0183] The rotary lock pin 400 passes through the hole formed by the first and second holes q1 and q2 and extends between the backrest 300 and the lip plate 200. The connecting portion 4 is plugged into and threaded into the mating portion 3. As the rotary lock pin 400 rotates, it moves axially. The tapered portion 5, due to its tapered expansion, presses against the front inner wall of the backrest 300 and the second hole q2, tightening the backrest 300 and the lip plate 200 and securing the wear member 100 to the lip plate 200.

[0184] The first parallel thread y1 and the second parallel thread not only convert the rotational motion of the rotary lock pin 400 into linear motion so that the rotary lock pin 400 can tighten the wear part 100 and the lip plate 200, but also the engagement of the first parallel thread y1 and the second parallel thread can limit the axial displacement of the rotary lock pin 400 due to up and down vibration in the use state, thereby ensuring the stability of the connection.

[0185] Except for the above-mentioned structure, other structural features are basically the same as those in embodiment 1. In particular, an anti-loosening locking mechanism is provided between the tapered portion 5 of the rotary lock pin 400 and the backrest 300, and the specific structure of the anti-loosening locking mechanism is consistent with that in the embodiment.

[0186] Example 3

[0187] This embodiment is based on the first embodiment and partially improves the structure of the front support member 202 and the rear support member 300. The differences between the two are described below, and the similarities are briefly described. Those skilled in the art will be able to combine this embodiment with the first embodiment to restore the full structure presented in the first embodiment.

[0188] As shown in FIG. 27 , in this embodiment, the front support member 202 in the first embodiment is deformed. The front support member 202 is deformed from the original integral component into a combined component including a front fixing member 202 a and a rear first rotating support member 202 b.

[0189] At the same time, the backrest member 300 is deformed. In this embodiment, the backrest member 300 includes a second rotating backrest member 300a at the front side and an inserting member 300b at the rear side.

[0190] The front side surface of the first rotating support member 202b abuts against the rear side surface of the fixing member 202a in the connected state, and the front side surface of the fixing member 202a abuts against the front inner wall of the second hole q2 in the connected state. The rear side surface of the first rotating support member 202b is the working surface that cooperates with the rotating locking pin 400, which is preferably the first concave cone surface p1.

[0191] The rear side surface of the second rotating support member 300a abuts against the front side surface of the insert 300b in the connected state, and the rear side surface of the insert 300b abuts against the rear inner hole wall of the first hole q1 in the connected state. The front side surface of the second rotating support member 300a cooperates with the rotating locking pin 400, which is preferably a second concave cone surface p2.

[0192] A pin channel 2 is formed between the first rotation support 202b and the second rotation support 300a. The structure of the rotary lock pin 400 is the same as that of the first embodiment, including an upper tapered portion 5 and a lower connecting portion 4. The connecting portion 4 is provided with a first parallel thread y1. The connecting portion 4 is preferably a cylindrical member, and the first parallel thread y1 is an external thread.

[0193] The lower rear end of the fixing member 202a is provided with an extended protrusion z. The upper surface of the extended protrusion z supports the first rotating support member 202b. The rear side of the extended protrusion z extends beyond the rear side of the first rotating support member 202b to form a rearwardly protruding mating portion 3. This mating portion 3 is located below the pin channel 2. Meanwhile, the second rotating support member 300a is located above the portion of this mating portion 3 that extends to the rear side of the pin channel 2. The mating portion 3 also supports the second rotating support member 300a.

[0194] In the connected state, the rotary lock pin 400 moves axially, and the tapered portion 5 opens the first rotating member 202 b and the second rotating member 300 a to press the fixing member 202 a and the insert 300 b , so that the wear member 100 is fixed on the lip plate 200 .

[0195] Similar to the first embodiment, the mating portion 3 is provided with a nut seat 31, which has an accommodating cavity c, within which a stabilizing nut 8 is located. The stabilizing nut 8 has a certain degree of mobility within the nut seat 31, including slight horizontal and vertical movement, making the stabilizing nut 8 a fine-tuning member with limited movement. This allows the stabilizing nut 8 to adaptively locate its position to ensure threaded engagement when the rotary lock pin 400 is twisted downward for insertion. Furthermore, the stabilizing nut 8 can adaptively fine-tune its relative position after the front support member 202 is expanded and displaced, thereby ensuring the adaptability and stability of the threaded connection.

[0196] Specifically, an upper seat wall c1 is provided on the upper side of the accommodating chamber c, and a lower seat wall c2 is provided on the lower side of the accommodating chamber c. Each of the upper seat wall c1 and the lower seat wall c2 has a through hole, and a second parallel thread is provided within the threaded hole of the stabilizing nut 8. The connecting portion 4 is a cylindrical member, and the first parallel thread y1 is provided on the outer circumference of the cylindrical member. The connecting portion 4 passes through the upper seat wall c1, the stabilizing nut 8, and the lower seat wall c2 in sequence. The upper seat wall c1 and the lower seat wall c2 not only restrict the stabilizing nut 8 from disengaging from the mating portion 3, but also provide relative guidance for the front support member 202 and the rotating lock pin 400.

[0197] Similar to the first embodiment, the fixing member 202a includes an upper transverse arm 21, a vertical arm 22, and a lower transverse arm 23. The rear end of the transverse arm is connected to the upper end of the vertical arm 22, and the lower end of the vertical arm 22 is connected to the rear end of the lower transverse arm 23, thereby forming a half-frame structure. The vertical arm 22 passes through the second hole q2. The upper transverse arm 21 is positioned between the upper surface of the lip plate body 201 and the upper wall of the connecting groove 1. The lower transverse arm 23 is positioned between the lower surface of the lip plate body 201 and the lower wall of the connecting groove 1.

[0198] The rear inner wall of the first hole q1 is located above the first protrusion 6 on the upper side of the connection groove 1 and below the second protrusion 7 on the lower side of the connection groove 1. The insert 300b includes a vertical abutment wall 301 and upper and lower limiting walls 302 and 303 located at the upper and lower ends of the vertical abutment wall 301. The vertical abutment wall 301 abuts the front ends of the first and second protrusions 6 and 7. The upper limiting wall 302 is located above the first protrusion 6, and the lower limiting wall 303 is located below the second protrusion 7. The upper and lower limiting walls 302 and 303 restrict the vertical movement of the insert 300b, further enhancing the secure connection.

[0199] As shown in FIG. 27 , preferably, a “7”-shaped member t extending out of the first hole q1 is provided at the upper end of the insert 300 b to facilitate clamping of the tool.

[0200] Preferably, the first rotating support 202b and the second rotating support 300a are substantially flush with each other, and their upper surfaces are close to the upper surface of the fixing member 202a in the connected state, so that the forces acting in the longitudinal direction are balanced and the stability is improved.

[0201] In addition to the above-mentioned structure, other structural features are basically the same as those in the embodiment. In particular, an anti-loosening locking mechanism is provided between the tapered portion 5 of the rotary lock pin 400 and the second rotary support member 300a. The specific structure of the anti-loosening locking mechanism is consistent with that in the embodiment.

[0202] This embodiment also provides an assembly method for the structure of the secure connection system of the wear part 100 of the fixed excavating equipment based on this embodiment. Of course, the above method is not the only assembly method for the secure connection system of the wear part 100 of the fixed excavating equipment of this embodiment.

[0203] The assembly method of the stable connection system for fixing the wear part 100 of the excavating equipment according to this embodiment specifically includes:

[0204] Step S10 : The fixing member 202 a passes through the second hole q2 of the lip plate body 201 and is fixedly connected to the lip plate body 201 .

[0205] Step S11: The front end of the lip plate body 201 with the fixing piece 202a extends into the connecting groove 1, and the remaining portion of the lip plate body 201 after being occupied by the fixing piece 202a enters the projection range of the first hole q1.

[0206] Step S12: The insert 300b passes through the first hole q1 and the second hole q2, and the vertical abutment wall 301 abuts against the front end surfaces of the first protrusion 6 and the second protrusion 7 of the first hole q1 of the wear part 100, the upper limit wall 302 is located on the upper side of the first protrusion 6, and the lower limit wall 303 is located on the lower side of the second protrusion 7.

[0207] Step S13: Insert the rotating lock pin 400 between the insert 300b and the fixing member 202a with the connecting portion 4 at the bottom. The connecting portion 4 is pre-screwed to the mating portion 3. Here, the connecting portion 4 and the stabilizing nut 8 of the mating portion 3 are adaptively plugged in and threaded. The rotating lock pin 400 leaves enough space for the first rotating support 202b and the second rotating support 300a to be inserted.

[0208] Step S14: Insert the first rotating support member 202b between the rotating lock pin 400 and the fixed member 202a, with the lower side of the first rotating support member 202b supported by the extended protrusion z of the fixed member 202a. Insert the second rotating support member 300a between the rotating lock pin 400 and the inserting member 300b, with the lower side of the second rotating support member supported by the portion of the extended protrusion z of the fixed member 202a that extends beyond the rotating lock pin 400.

[0209] Step S15: The rotary lock pin 400 rotates and moves axially, and the tapered portion 5 squeezes the first rotary support member 202b and the second rotary support member 300a due to the tapered expansion, so that the front side of the first rotary support member 202b abuts against the fixed member 202a, and the rear side of the second rotary support member 300a abuts against the insert member 300b. The lip plate body 201 and the wear part 100 are tightened and fixed, and the anti-loosening locking mechanism between the tapered portion 5 of the rotary lock pin 400 and the second rotary support member 300a is in a locked state.

[0210] Step 16: The stabilizing block 11 is inserted into the stabilizing groove 10 and then secured to the lip plate body 201, further strengthening the connection between the wear component 100 and the lip plate body 201. Alternatively, the stabilizing block 11 can be pre-secured to the lip plate body 201 before step S11, so that when the lip plate body 201 is inserted into the connecting groove 1, the stabilizing block 11 is embedded in the stabilizing groove 10. In this case, step S16 is unnecessary, and after step S15, the stabilizing block 11 and the stabilizing groove 10 are fully engaged.

[0211] Of course, it should be understood that the lip plate 200 may include a front support member 202, which may include a fixed member 202a and a first rotating support member 202b, while the rear support member 300 may be an integral component. Alternatively, the lip plate 200 may be an integral component, while the rear support member 300 may include a second rotating support member 300a and an insert member 300b. It will be apparent to those skilled in the art that improvements may be achieved by combining the various embodiments without departing from the principles of the present invention.

[0212] Example 4

[0213] This embodiment partially improves the structure of the mating portion 3 and the connecting portion 4 based on the first embodiment. The differences between the two are described below, while the similarities are briefly described. Those skilled in the art will be able to combine this embodiment with the first embodiment to restore the full structure presented in the first embodiment. The mating method provided in this embodiment can also be applied to the structures of the second and third embodiments.

[0214] As shown in Figures 28-30, the rear raised mating portion 3 of the front support member 202 is provided with a nut seat 31, which has a receiving cavity c. A stabilizing screw 8' is positioned within the receiving cavity c. This stabilizing screw 8' comprises a nut 81 and a screw 82, with a second parallel thread y2 disposed on the outer circumference of the screw 82 on the cylindrical member.

[0215] The nut 81 is located in the accommodating chamber c and is restricted by the upper seat wall c1 and the lower seat wall c2 of the nut seat 31. The upper seat wall c1 is provided with a through hole, and the screw 82 extends upward from the through hole of the upper seat wall c1.

[0216] As shown in FIG29 , the solid body of the rotary lock pin 400 forms a tapered portion 5 , and the connecting portion 4 is a threaded hole extending from the lower end surface of the solid body into the solid body, and the first parallel thread y1 is disposed in the concave threaded hole.

[0217] The stabilizing screw 8' has a certain degree of mobility in the nut seat 31, which includes slight movements in the horizontal and vertical directions, so that the stabilizing screw 8' becomes a fine-tuning component with limited movement, so that it can adaptively find its position to make the threads fit when the rotating locking pin 400 is screwed downward and inserted, and can also adaptively fine-tune the relative position after the front support member 202 is stretched and displaced, thereby ensuring the adaptability and stability of the threaded connection.

[0218] Preferably, in the connected state, the screw 82 passes through the through hole of the lower seat wall c2 and extends into the threaded hole of the rotary lock pin 400, and the first parallel thread y1 and the second parallel thread y2 cooperate to realize threaded screwing, and the lower end face of the rotary lock pin 400 rests on the upper seat wall c1, forming a downward restriction to prevent the structure from being too tight and making it difficult to disassemble.

[0219] The above describes the secure connection system and assembly method for securing wear parts of excavating equipment provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The above examples are intended only to facilitate understanding of the present invention and its core concepts. It should be noted that those skilled in the art will appreciate that various improvements and modifications may be made to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims.

Claims

1. A stable connection system for fixing worn components of an excavation device, characterized in that: It includes a worn component, a lip plate body, a front abutting member, a rear abutting member and a rotary locking pin; The worn component is provided with a connection groove with an opening at the rear side and a first hole extending vertically; The lip plate body is provided with a second hole extending vertically, and the axis direction of the second hole is the same as that of the first hole; The front end of the lip plate body extends into the connection groove; the second hole is located within the first hole to form a hole part; The front abutting member and the rear abutting member are located within the hole part and a pin channel is formed between the two; The rotary locking pin includes a connection part provided with first parallel threads and a tapered part with an outer diameter gradually decreasing from top to bottom; The rear side of the front abutting member is provided with a mating part, and the mating part is provided with second parallel threads; The rotary locking pin passes through the hole part and is arranged within the pin channel, and the connection part is inserted and screwed with the mating part; The rotary locking pin rotates and axially moves within the pin channel, and the tapered part presses the front abutting member and the rear abutting member, so that the front abutting member abuts forward against the lip plate body and the rear abutting member abuts backward against the worn component, thereby fixing the worn component on the lip plate body.

2. The stable connection system for fixing worn components of an excavation device according to claim 1, characterized in that: The front abutting member includes an upper cross arm, a vertical arm and a lower cross arm. The rear end of the upper cross arm is connected to the upper end of the vertical arm, and the lower end of the vertical arm is connected to the rear end of the lower cross arm to enclose and form a semi-frame structure; The lower rear side of the vertical arm bulges backward to form the mating part, and the upper rear side of the vertical arm is provided with an acting surface; The vertical arm passes through the second hole, the upper cross arm is placed between the upper surface of the lip plate body and the upper groove wall of the connection groove, and the lower cross arm is placed between the lower surface of the lip plate body and the lower groove wall of the connection groove; The tapered part presses the acting surface of the vertical arm, and the front side surface of the vertical arm abuts against the inner wall of the second hole.

3. The stable connection system for fixing worn components of an excavation device according to claim 1, characterized in that: The mating part is provided with a threaded hole having the second parallel threads; the connection part is a cylindrical member, and the first parallel threads are provided on the outer peripheral surface of the cylindrical member; Or the mating part is provided with a cylindrical member, the second parallel threads are provided on the outer peripheral surface of the cylindrical member, and the connection part is a threaded hole having the first parallel threads at the lower end of the rotary locking pin.

4. The stable connection system for fixing worn components of an excavation device according to claim 1, characterized in that: The rear side of the front abutting member is provided with a first concave conical surface; the front side of the rear abutting member is provided with a second concave conical surface; the taper of the first concave conical surface and the second concave conical surface is the same as that of the tapered part; A plurality of longitudinally extending strip-shaped recessed grooves are distributed on the outer periphery of the tapered part of the rotary locking pin, and the groove surface of the strip-shaped recessed groove is in arc transition with the outer peripheral surface of the tapered part. The second concave conical surface of the rear abutting member is provided with a protruding elastic locking buckle; the head of the elastic locking buckle is provided with a tongue inclined surface to make it difficult to rotate in the reverse direction; In the first state, the rotary locking pin is subjected to an externally applied circumferential force, and the elastic locking buckle slides along the groove surface and jumps into an adjacent strip-shaped recessed groove; In the second state, when the externally applied circumferential force is removed, the elastic locking buckle is snapped into a specific strip-shaped recessed groove to limit the rotation of the rotary locking pin.

5. The stable connection system for fixing a worn component of an excavating device according to claim 1, wherein: The rear inner wall of the first hole is provided with a first protrusion above the connection groove and a second protrusion below the connection groove; The rear support member includes a vertical abutting wall and upper and lower limit walls located at the upper and lower ends of the vertical abutting wall; The vertical abutting wall abuts against the front end faces of the first protrusion and the second protrusion, the upper limit wall is located above the first protrusion, and the lower limit wall is located below the second protrusion.

6. The stable connection system for fixing a worn component of an excavating device according to claim 1, wherein: The upper end of the rear support member is provided with a "7”-shaped member extending out of the first hole for facilitating the clamping of a tool.

7. The stable connection system for fixing a worn component of an excavating device according to claim 1, wherein: The mating portion is provided with a nut seat, and the nut seat is provided with a receiving cavity; an upper seat wall is provided above the receiving cavity, and a lower seat wall is provided below the receiving cavity; A stable nut that can be limited in movement is provided in the receiving cavity, and the stable nut is restricted between the upper seat wall and the lower seat wall; or a stable screw that can be limited in movement is provided in the receiving cavity, and the nut of the stable screw is restricted between the upper seat wall and the lower seat wall.

8. The stable connection system for fixing a worn component of an excavating device according to claim 1, wherein: The front support member includes a front fixing member and a rear first rotary support member; the rear support member includes a front second rotary support member and a rear insert member; The rotary locking pin presses against the first rotary support member and the second rotary support member, the first rotary support member presses against the fixing member, the fixing member presses against the lip plate body, the second rotary support member presses the insert member backward, and the insert member presses the worn component backward.

9. The stable connection system for fixing a worn component of an excavating device according to claim 2, wherein: A stable groove is provided at the rear of the worn component; stable blocks are respectively fixedly provided on the upper and lower sides of the lip plate body; The stable blocks are fitted into the stable groove to stabilize the worn component.

10. A stable connection system for fixing a worn component of an excavating device, wherein: It includes a worn component, a lip plate, a rear support member and a rotary locking pin; The worn component is provided with a connection groove with an open rear side and a first mounting hole extending vertically; The lip plate is provided with a second mounting hole extending vertically, and the axis direction of the second mounting hole is the same as that of the first mounting hole; The front end of the lip plate extends into the connection groove; the second mounting hole is located within the first mounting hole; The rear support member passes through the first mounting hole and the second mounting hole, and a mating portion located below the second mounting hole is provided on the rear support member or the lip plate. The mating portion is provided with second parallel threads; The rotary locking pin includes a connecting portion provided with first parallel threads at the lower side and a tapered portion with an outer diameter gradually decreasing from top to bottom at the upper side; One side of the second mounting hole of the lip plate opposite to the rear support member is provided with a first inclined surface; a second inclined surface is provided at the front side of the rear support member; the slopes of the first inclined surface and the second inclined surface are consistent with that of the tapered portion; The rotary locking pin passes through the first mounting hole and the second mounting hole and is disposed between the rear support member and the lip plate, and the connecting portion is inserted and screwed with the mating portion; The rotary locking pin rotates and axially moves, and the tapered portion expands due to the taper to extrude the rear support member and the lip plate, thereby fixing the worn component on the lip plate.

11. The stable connection system for fixing the worn component of an excavating device according to claim 10, wherein: The inner wall at the rear side of the first mounting hole is provided with a first protrusion above the connecting groove and a second protrusion below the connecting groove; The rear support member includes a vertical abutting wall and upper and lower limiting walls located at the upper and lower ends of the vertical abutting wall; The vertical abutting wall abuts against the front end surfaces of the first protrusion and the second protrusion, the upper limiting wall is located above the first protrusion, and the lower limiting wall is located below the second protrusion.

12. The stable connection system for fixing the worn component of an excavating device according to claim 11, wherein: One side of the second mounting hole of the lip plate opposite to the rear support member is provided with a first concave tapered surface; a second concave tapered surface is provided at the front side of the rear support member; the taper of the first concave tapered surface and the second concave tapered surface is consistent with that of the tapered portion; A plurality of longitudinally extending strip-shaped recessed grooves are distributed on the outer periphery of the tapered portion of the rotary locking pin, and the groove surface of the strip-shaped recessed groove is in arc transition with the outer peripheral surface of the tapered portion. An elastic locking buckle is provided on the second concave tapered surface of the rear support member; the head of the elastic locking buckle is provided with a tongue inclined surface to make it difficult to rotate in the reverse direction; In the first state, the rotary locking pin is subjected to an externally applied circumferential force, and the elastic locking buckle slides along the groove surface and jumps into an adjacent strip-shaped recessed groove; In the second state, when the externally applied circumferential force is removed, the elastic locking buckle is snapped into a specific strip-shaped recessed groove to limit the rotation of the rotary locking pin.

13. The stable connection system for fixing the worn component of an excavating device according to claim 10, wherein: The lip plate includes a lip plate body and a front support member, and the lip plate body is provided with a second hole; The front support member passes through the second hole and abuts against the lip plate body; A pin channel for the rotary locking pin to pass through is formed between the front support member and the rear support member; The rotary locking pin is screwed to expand the front support member and the rear support member outwards, thereby realizing the fixation of the worn component and the lip plate body.

14. The stable connection system for fixing the worn component of an excavating device according to claim 10, wherein: The mating part is provided with a threaded hole having the second parallel threads; the connecting part is a cylindrical member, and the first parallel threads are provided on the outer peripheral surface of the cylindrical member; or the mating part is provided with a cylindrical member, the second parallel threads are provided on the outer peripheral surface of the cylindrical member, and the connecting part is a threaded hole having the first parallel threads at the lower end of the rotary locking pin.

15. The stable connection system for fixing worn parts of an excavating device according to claim 10, wherein: The mating part is provided with a nut seat, and the nut seat is provided with a receiving cavity; an upper seat wall is provided on the upper side of the receiving cavity, and a lower seat wall is provided on the lower side of the receiving cavity; A stable nut that can move with limited amplitude is provided in the receiving cavity, and the second parallel threads are provided in the threaded hole of the stable nut, and the stable nut is restricted between the upper seat wall and the lower seat wall; or a stable screw that can move with limited amplitude is provided in the receiving cavity, the second parallel threads are provided on the screw rod of the stable screw, and the nut of the stable screw is restricted between the upper seat wall and the lower seat wall.

16. The stable connection system for fixing worn parts of an excavating device according to claim 13, wherein: The front abutting member includes an upper cross arm, a vertical arm, and a lower cross arm. The rear end of the upper cross arm is connected to the upper end of the vertical arm, and the lower end of the vertical arm is connected to the rear end of the lower cross arm to enclose a semi-frame structure; A mating part is formed by the lower section of the rear side of the vertical arm bulging backward, and an acting surface that is squeezed by the tapered part is provided on the upper section of the rear side of the vertical arm; The vertical arm passes through the second mounting hole, the upper cross arm is placed between the upper surface of the lip plate body and the upper groove wall of the connecting groove, and the lower cross arm is placed between the lower surface of the lip plate body and the lower groove wall of the connecting groove; Upper recesses adapted to the upper cross arm and lower recesses adapted to the lower cross arm are respectively provided inside the worn part, and there is a mating gap between the upper cross arm, the lower cross arm and the worn part; First concave portions are provided at the front side corners of the upper cross arm and the vertical arm and at the front side corners of the lower cross arm and the vertical arm.

17. The stable connection system for fixing worn parts of an excavating device according to claim 11, wherein: The worn part is U-shaped and includes an upper branch and a lower branch, and a connecting groove is formed between the upper branch and the lower branch; Stable grooves are provided at the rear sides of the upper branch and the lower branch; stable blocks are respectively fixed on the upper and lower sides of the lip plate; the stable blocks are fitted into the stable grooves to stabilize the worn part.

18. The assembly method of the stable connection system for fixing worn parts of an excavating device: characterized in that: The assembly objects include a worn part, a lip plate, a rear abutting member, and a rotary locking pin; The worn part is provided with a connecting groove with an open rear side and a first mounting hole extending vertically, and the lip plate is provided with a second mounting hole extending vertically; The rotary locking pin includes a connecting part located at the lower side and having the first parallel threads and a tapered part whose outer diameter gradually decreases from top to bottom; ​ A fitting part is provided on the backrest or the lip plate. The fitting part is provided with a fine-tuning member that is limited in movement. The fine-tuning member is provided with a second parallel thread that matches the first parallel thread. A plurality of longitudinally extending strip-shaped recessed grooves are distributed on the outer periphery of the tapered portion of the rotary locking pin. An elastic locking buckle protrudes on the front side surface of the backrest. The assembly steps include: Step S1: Insert the front end of the lip plate into the connection groove, and the second mounting hole is located within the first mounting hole. Step S2: The backrest passes through the first mounting hole and the second mounting hole. The backrest is located at the rear part of the first mounting hole and the second mounting hole. A pin channel is formed between the backrest and the hole wall of the second mounting hole of the lip plate. The fitting part is located at the lower part of the pin channel. Step S3: The rotary locking pin passes through the first mounting hole and the second mounting hole in a manner that the connecting part is at the lower side and is inserted into the pin channel. The connecting part is adaptively inserted and screwed with the fine-tuning member of the fitting part. Step S4: The rotary locking pin rotates and axially moves. Due to the taper, the tapered portion expands and presses the backrest and the lip plate. The elastic locking buckle enters the strip-shaped recessed groove and switches between different strip-shaped recessed grooves as it rotates; the wear part is fixed on the lip plate.

19. The assembly method of the stable connection system for fixing the wear part of the excavating equipment according to claim 18, characterized in that: In the object to be assembled, the lip plate includes a lip plate body and a front backrest. The lip plate body is provided with a second hole. The front backrest includes an upper cross arm, a vertical arm, and a lower cross arm. The rear end of the upper cross arm is connected to the upper end of the vertical arm, and the lower end of the vertical arm is connected to the rear end of the lower cross arm to enclose a semi-frame structure. A lower rear section of the rear side of the vertical arm protrudes backward to form the fitting part. An acting surface is provided on the upper rear section of the rear side of the vertical arm. The acting surface is a first concave conical surface. The rear inner wall of the first mounting hole is provided with a first protrusion above the connection groove and a second protrusion below the connection groove. The backrest includes a vertical abutting wall and upper and lower limiting walls at the upper and lower ends of the vertical abutting wall. The front side surface of the vertical abutting wall is a second concave conical surface. In its assembly steps, before step S1, there is also step S0. In step S0, the vertical arm of the front backrest passes through the second hole. The upper cross arm is placed on the upper side of the lip plate body, and the lower cross arm is placed on the lower side of the lip plate body. The front side surface of the vertical arm abuts against the inner wall of the second hole. The front backrest and the lip plate body together form the lip plate. In step S2, the vertical abutting wall abuts against the front end surfaces of the first protrusion and the second protrusion. The upper limiting wall is located above the first protrusion, and the lower limiting wall is located below the second protrusion; a pin channel is formed between the first concave conical surface of the vertical arm and the second concave conical surface of the vertical abutting wall.

20. The assembly method of the stable connection system for fixing the wear part of the excavating equipment according to claim 18, characterized in that: Among the assembly objects, a stable groove is provided at the rear side of the worn part; the bottom surface of the stable groove is a first mating inclined surface that slopes forward from the rear towards the connecting groove, and the side surface of the stable groove is a second mating inclined surface that gradually expands outwards towards the lip plate; Stable blocks are respectively provided on the upper and lower sides of the lip plate; In the assembly steps, the stable blocks are pre-fixed on the lip plate before step S1. When the lip plate is inserted into the connecting groove, the stable blocks are fitted into the stable grooves; or the stable blocks are inserted into the stable grooves after step S4 and then fixed to the lip plate.

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