An excavator bucket tooth assembly with reliable connection

Abstract

The present invention discloses an excavator bucket tooth assembly with reliable connection in the technical field of excavator bucket teeth, which includes a bucket tooth seat and a tooth sleeve. A sleeve cavity is provided in the middle of the tooth sleeve, and a connecting rod is rotatably connected in the sleeve cavity. A plurality of arc-shaped triangular blocks are fixedly connected to the outside of the connecting rod. The front end of the bucket tooth seat is fixedly connected with an inner plug, a connecting hole is provided in the middle of the inner plug, and an unlocking channel is provided in the middle of the bucket tooth seat. The unlocking channel is located at the rear end of the connecting hole and is vertically communicated with the connecting hole. A plurality of anti-disengagement arc pieces are fixedly connected in the connecting hole. The arc-shaped triangular blocks cooperate with the anti-disengagement arc pieces to fix the connecting rod in the connecting hole. A fixing component for driving the connecting rod to rotate and lock is provided in the unlocking channel. The present invention is simple and easy to operate for replacement and installation, greatly reduces the joint gap, has good strength, and the connection is not easy to loosen.

Description

Technical Field

[0001] The present invention relates to the technical field of excavator bucket teeth, and particularly to an excavator bucket tooth assembly with reliable connection. Background Art

[0002] Bucket teeth and tooth seats are provided at the edges of the excavator bucket. The two need to be fixedly connected with pins, that is, both the tooth seat and the bucket teeth should have pin holes that cooperate with the pins. At the same time, the tooth seat is welded to the edge of the excavator bucket. Due to the strong impact forces during the construction of the excavator on the bucket teeth and the tooth seat, the pin becomes the conduction center of the strong impact force between the bucket teeth and the tooth seat. During instantaneous action, the pin is the main force carrier, so the pin becomes the weakest point, prone to fracture and difficult to replace after fracture. And this connection method requires a certain gap between the tooth seat and the tooth sleeve to ensure that there is a margin for centering the assembly hole when installing the pin. If there is no gap, it is difficult to replace, and the processing and manufacturing need to reach a quite high precision. Under the action of the impact force, impact and friction occur between the tooth seat and the tooth sleeve, generating high temperature, reducing the hardness and impact toughness of the material, resulting in rapid wear of the tooth tip, fracture of the tooth seat under impact, and increasing the replacement cost.

[0003] Based on this, the present invention designs an excavator bucket tooth assembly with reliable connection to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an excavator bucket tooth assembly with reliable connection to solve the problems of difficult replacement, low strength, large gap, and easy damage after installation mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An excavator bucket tooth assembly with reliable connection includes a bucket tooth seat and a tooth sleeve. A sleeve cavity is provided in the middle of the tooth sleeve. A connecting rod is rotatably connected in the sleeve cavity. A plurality of arc-shaped triangular blocks are fixedly connected to the outside of the connecting rod. An inner plug is fixedly connected to the front end of the bucket tooth seat. A connection hole is provided in the middle of the inner plug. An unlocking channel is provided in the middle of the bucket tooth seat. The unlocking channel is located at the rear end of the connection hole and is vertically communicated with the connection hole. A plurality of anti-detachment arc pieces are fixedly connected in the connection hole. The arc-shaped triangular blocks cooperate with the anti-detachment arc pieces to fix the connecting rod in the connection hole. A fixing component is provided in the unlocking channel for driving the connecting rod to rotate and lock.

[0007] Preferably, the fixing component includes a straight gear fixedly connected to the end of the connecting rod and a straight rack slidably connected in the unlocking channel. The straight gear at the end of the connecting rod passing through the connection hole meshes with the straight rack.

[0008] Preferably, the fixing component includes a square hole formed at the end of the connecting rod and a driving rod rotatably connected in the connecting hole. The inner end of the driving rod is fixedly connected with a square rod, and the outer end of the square rod is fixedly connected with an internal gear. An internal rack is slidably connected in the unlocking channel, and the internal rack meshes with the internal gear.

[0009] Preferably, a protective ring is rotatably connected between the outer part of the driving rod and the inside of the connecting hole. The inner end of the protective ring is fixedly connected with two rear retaining strips, and the outer end of the rear retaining strips is fixedly connected with an external gear. An external rack is slidably connected in the unlocking channel, and the external gear meshes with the external rack.

[0010] Preferably, a balance piece is fixedly connected to the side wall of the rear retaining strip, a balance groove is formed in the connecting hole, the balance piece is slidably fitted in the balance groove, a sequence groove is formed on the side of the external rack adjacent to the internal rack, and a sequence rod is fixedly connected to the side of the internal rack adjacent to the external rack. The sequence rod is slidably fitted in the sequence groove.

[0011] Preferably, positioning screws are threadedly connected to the middle parts of the external rack and the internal rack, and the positioning screws are rotatably connected in the unlocking channel.

[0012] Preferably, one side of the unlocking channel is closed, and the other side is rotatably connected with a protective cover.

[0013] Preferably, the inner plug is trapezoidal, and the sleeving cavity has a shape adapted to the inner plug.

[0014] Preferably, an adapter seat is fixedly connected in the sleeving cavity, the connecting rod is rotatably connected in the adapter seat, the end of the connecting hole is a countersunk hole, and the adapter seat matches the countersunk hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] When the tooth sleeve of the present invention is sleeved, the connecting rod is aligned with the connecting hole and inserted, and the connecting rod is rotated so that the arc-shaped triangular block enters between each anti-loosening arc piece. When the connecting rod is rotated, the connecting rod and the tooth sleeve will be tightened inward under the action of the arc-shaped triangular block, so that the tooth sleeve can be more tightly sleeved on the inner plug, greatly reducing the connection gap and effectively preventing dust and the like from entering the interior; when the plugging is completed, the connecting rod is rotated to tighten, and at the same time, under the cooperation of the arc-shaped triangular block and the anti-loosening arc piece, the connecting rod cannot be disengaged from the connecting hole. At the same time, the mutual plugging of multiple groups of arc-shaped triangular blocks and anti-loosening arc pieces enhances the connection tightness and strength between the tooth sleeve and the bucket tooth seat. The plugging fit between the sleeving cavity and the inner plug can make up for the internal cavity of the tooth sleeve. When the tooth sleeve is used for excavation work, it has good strength, can withstand greater forces, and the connection is not easy to loosen. The replacement and installation are simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the overall side view structure of the present invention;

[0019] Figure 2 Schematic diagram of the top view structure of the present invention;

[0020] Figure 3 Schematic diagram of the partially cut-away internal structure of the tooth sleeve of the present invention;

[0021] Figure 4 Schematic diagram of the partially cut-away internal structure of the tooth bucket seat of the present invention;

[0022] Figure 5 Schematic diagram of the partially cut-away internal structure of the front end view of the tooth bucket seat of the present invention;

[0023] Figure 6 Schematic diagram of the partially cut-away side view of the tooth bucket seat of the present invention;

[0024] Figure 7 Schematic diagram of the partially cut-away rear view of the tooth bucket seat of the present invention;

[0025] Figure 8 Schematic diagram of the unfolded positions of the rear retaining bar, arc-shaped triangular block and anti-disengagement arc piece of the present invention.

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 1. Tooth bucket seat; 2. Tooth sleeve; 3. Sleeve cavity; 4. Connecting rod; 5. Arc-shaped triangular block; 6. Inner plug; 7. Connecting hole; 8. Unlocking channel; 9. Anti-disengagement arc piece; 10. Square hole; 11. Driving rod; 12. Square rod; 13. Inner gear; 14. Inner rack; 15. Protective ring; 16. Rear retaining bar; 17. Outer gear; 18. Outer rack; 19. Balance piece; 20. Balance groove; 21. Sequential groove; 22. Sequential rod; 23. Positioning screw; 24. Protective cover; 25. Adapter seat; 26. Countersunk hole. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] Please refer to Figure 1-8 , the present invention provides a technical solution:

[0030] An excavator bucket tooth assembly with reliable connection, including a bucket tooth seat 1 and a tooth sleeve 2. A sleeve cavity 3 is provided in the middle of the tooth sleeve 2. A connecting rod 4 is rotatably connected in the sleeve cavity 3. A plurality of arc-shaped triangular blocks 5 are fixedly connected to the outside of the connecting rod 4. An inner plug 6 is fixedly connected to the front end of the bucket tooth seat 1. A connecting hole 7 is provided in the middle of the inner plug 6. An unlocking channel 8 is provided in the middle of the bucket tooth seat 1. The unlocking channel 8 is located at the rear end of the connecting hole 7 and is vertically communicated with the connecting hole 7. A plurality of anti-detachment arc pieces 9 are fixedly connected in the connecting hole 7. The arc-shaped triangular blocks 5 cooperate with the anti-detachment arc pieces 9 to fix the connecting rod 4 in the connecting hole 7. A fixing component is provided in the unlocking channel 8 for driving the connecting rod 4 to rotate and lock.

[0031] Please refer to Figure 1-5 , the present invention needs to weld the bucket tooth seat 1 on the cutting edge plate of the excavator bucket, and then sleeve the tooth sleeve 2 on the inner plug 6. During the sleeving, the connecting rod 4 is aligned with the connecting hole 7, and the arc-shaped triangular blocks 5 are aligned with the gaps between the anti-detachment arc pieces 9 on the upper and lower sides of the connecting hole 7, so that the connecting rod 4 can be smoothly inserted into the connecting hole 7. When the connecting rod 4 is completely inserted into the connecting hole 7, please refer to Figure 8 , at this time, the narrow end of the arc-shaped triangular block 5 just faces the entrance of each group of anti-detachment arc pieces 9. At this time, only need to rotate the connecting rod 4 so that the arc-shaped triangular block 5 enters between each group of anti-detachment arc pieces 9. When rotating the connecting rod 4, the connecting rod 4 will be tightened inward together with the tooth sleeve 2 under the action of the arc-shaped triangular block 5, so that the tooth sleeve 2 can be sleeved on the inner plug 6 more tightly, greatly reducing the connection gap, effectively preventing dust and the like from entering the inside, and avoiding friction, etc.; when the insertion is completed, rotate the connecting rod 4 to tighten, and at the same time, under the cooperation of the arc-shaped triangular block 5 and the anti-detachment arc piece 9, the connecting rod 4 cannot be detached from the connecting hole 7. At the same time, the mutual insertion of the plurality of arc-shaped triangular blocks 5 and the anti-detachment arc pieces 9 enhances the connection tightness and strength between the tooth sleeve 2 and the bucket tooth seat 1. At the same time, the insertion and connection of the sleeve cavity 3 and the inner plug 6 can make up for the internal cavity of the tooth sleeve 1. When using the tooth sleeve 2 for excavation work, it has good strength, can withstand greater forces, and the connection is not easy to loosen. The impact received by the tooth sleeve 2 during use will not act on the internal connecting rod 4 and other structures. The connection structure is relatively safe and not easy to be damaged. And as long as the tooth sleeve 2 has the same sleeve cavity 3 and connecting rod 4, it can be adapted to the bucket tooth seat 1. The shape of the tooth sleeve 2 is not restricted, and tooth sleeves 2 with different shapes and functional focuses can be installed.

[0032] Embodiment 1

[0033] Among them, the fixing component includes a spur gear fixedly connected to the end of the connecting rod 4 and a spur rack slidably connected in the unlocking channel 8. The spur gear at the end of the connecting rod 4 passing through the connecting hole 7 meshes with the spur rack.

[0034] By pushing the straight rack inward, the spur gear can be driven to rotate, and then the connecting rod 4 can be driven to rotate. This method is relatively simple and fast, but more gears need to be made at the end of the connecting rod 4, increasing the cost of the vulnerable part, the gear sleeve 2.

[0035] Embodiment 2

[0036] Please refer to Figure 3-5 , wherein the fixing component includes a square hole 10 opened at the end of the connecting rod 4 and a driving rod 11 rotatably connected in the connecting hole 7. The inner end of the driving rod 11 is fixedly connected with a square rod 12, and the outer end is fixedly connected with an internal gear 13. An internal rack 14 is slidably connected in the unlocking channel 8, and the internal rack 14 meshes with the internal gear 13.

[0037] By adding a square hole 10 at the end of the connecting rod 4, when the connecting rod 4 is inserted into the connecting hole 7, the square hole 10 is sleeved outside the square rod 12. At this time, only by pushing the internal rack 14 inward can the internal gear 13 be driven to move, and then the driving rod 11 can be driven to rotate. Thus, through the cooperation of the square rod 12 and the square hole 10, the connecting rod 4 can be driven to rotate, realizing the positioning and tightening of the gear sleeve 2. This method reduces the cost of the vulnerable part, the gear sleeve 2, and enables the connecting rod 4 to have a larger diameter range, which is beneficial to improving the connection strength and adaptability.

[0038] Please refer to Figure 4-7 , wherein a protective ring 15 is rotatably connected between the outer side of the driving rod 11 and the inside of the connecting hole 7. The inner end of the protective ring 15 is fixedly connected with two rear blocking strips 16, and the outer end is fixedly connected with an external gear 17. An external rack 18 is slidably connected in the unlocking channel 8, and the external gear 17 meshes with the external rack 18.

[0039] By adding a rear blocking strip 16 in the connecting hole 7, after the connecting rod 4 rotates to a suitable position, the rear blocking strip 16 rotates to a position where it fits against the rear end of the arc-shaped triangular block 5, providing further protection to prevent the connecting rod 4 from easily reversing during long-term use, resulting in the loosening of the gear sleeve 2, and increasing the safety and strength of the connection between the connecting rod 4 and the connecting hole, providing the first line of defense for the connection of the connecting rod 4.

[0040] Please refer to Figure 4-5 , wherein a balance piece 19 is fixedly connected to the side wall of the rear blocking strip 16, and a balance groove 20 is opened in the connecting hole 7. The balance piece 19 is slidably fitted in the balance groove 20; when the rear blocking strip 16 rotates, it drives the balance piece 19 to rotate simultaneously in the arc-shaped balance groove 20. The front end of the rear blocking strip 16 has a support and is not easily distorted, which is beneficial to blocking the arc-shaped triangular block 5.

[0041] Please refer to Figure 7-8 , a sequential groove 21 is opened on the side of the external rack 18 adjacent to the internal rack 14, and a sequential rod 22 is fixedly connected to the side of the internal rack 14 adjacent to the external rack 18. The sequential rod 22 is slidably fitted in the sequential groove 21.

[0042] Only in this way can the inner rack 14 be first pushed to move inward to drive the inner gear 14 to rotate, so that the connecting rod 4 rotates first. When the sequence rod 22 reaches the front end of the sequence groove 21, the outer rack 18 can move forward to drive the outer gear 17 to rotate, and then drive the rear stop bar 16 to rotate to the rear end of the arc-shaped triangular block 5 to block it. Under the inward movement of the outer rack 18, the rear end of the sequence groove 21 is also close to the sequence rod 22, so that the inner rack 14 cannot move outward. Therefore, even if there is looseness, the rear stop bar 16 must loosen and rotate first. When the connecting rod 4 has a tendency to loosen, it must overcome the locking forces of the inner rack 14 and the outer rack 18, so that the connection of the connecting rod 4 is very reliable, and the tightness and strength are effectively guaranteed.

[0043] Please refer to Figure 6-7 , positioning screws 23 are threadedly connected to the middle parts of the outer rack 18 and the inner rack 14 respectively, and the positioning screws 23 are rotatably connected to the unlocking channels 8.

[0044] Using the positioning screws 23 to drive the outer rack 18 and the inner rack 14 to move respectively, so that the two racks move forward more precisely, can drive the connecting rod 4 to rotate with stepless feed, and enable the arc-shaped triangular block 5 to enter between the anti-drop arc pieces 9 to the greatest extent, and sleeve the tooth sleeve 2 on the bucket tooth seat 1 in the tightest posture. The tighter it is, the more reliable and safe the tooth sleeve 2 is when in use. At the same time, the positioning screw 23 has a self-locking function, so that the outer rack 18 and the inner rack 14 can stop immediately in the current state after adjustment without other means, which is more convenient and fast.

[0045] When disassembling the tooth sleeve 2, it is also necessary to first rotate the positioning screw 23 to make the outer rack 18 retract backward, so that the outer gear 17 rotates to drive the rear stop bar 16 to rotate backward. When the front end of the sequence groove 21 fits with the sequence rod 22, the inner rack 14 retracts backward, driving the connecting rod 4 to rotate and the arc-shaped triangular block 5 to exit the interval between each group of anti-drop arc pieces 9. Since the width of the tail end of the arc-shaped triangular block 5 is greater than the gap between each group of anti-drop arc pieces 9, when the positioning screw 23 of the inner rack 14 cannot be rotated, the arc-shaped triangular block 5 completely exits the anti-drop arc piece and the connecting rod 4 cannot continue to rotate. At this time, the arc-shaped triangular block 5 is located in the smooth gap of the connecting hole 7, and the tooth sleeve 2 can be directly pulled out to complete the disassembly of the tooth sleeve 2. The disassembly is simple and convenient, and the internal structure is all inside the bucket tooth seat 1, not easy to be contaminated with dirt and sundries, not easy to rust, etc. The disassembly is flexible and simple, and no other additional tools are required for disassembly and installation, and there will be no jamming, etc., which is time-saving and labor-saving, and can quickly replace the bucket teeth.

[0046] Please refer to Figure 7 , one side of the unlocking channel 8 is closed, and the other side is rotatably connected with a protective cover 24. The internal components are protected by the protective cover 24 to prevent sundries from entering the unlocking channel 8.

[0047] Please refer toFigure 1-2 , the inner plug 6 is trapezoidal, and the sleeving cavity 3 has a shape adapted to the inner plug 6. The sleeving has a guiding effect, is relatively easy to sleeve, and is conducive to more tightly sleeving and fitting.

[0048] Please refer to Figure 3 and Figure 5 , a transfer seat 25 is fixedly connected in the sleeving cavity 3, the connecting rod 4 is rotatably connected in the transfer seat 25, the end of the connecting hole 7 is a countersunk hole 26, and the transfer seat 25 matches the countersunk hole 26.

[0049] Installing the connecting rod 4 through the transfer seat 25 is relatively stable and easy to manufacture. Through the countersunk hole 26, when the gear sleeve 2 is sleeved, the transfer seat 25 enters the countersunk hole 26, and can be completely sleeved and in close contact.

[0050] In the description of this specification, the descriptions with reference to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0051] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor limit the invention to only the specific embodiments. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An excavator bucket tooth assembly with reliable connection, Characterized in that: It includes a bucket tooth seat (1) and a tooth sleeve (2). A sleeve cavity (3) is provided in the middle of the tooth sleeve (2). A connecting rod (4) is rotatably connected in the sleeve cavity (3). A plurality of arc-shaped triangular blocks (5) are fixedly connected to the outside of the connecting rod (4). An inner plug (6) is fixedly connected to the front end of the bucket tooth seat (1). A connecting hole (7) is provided in the middle of the inner plug (6). An unlocking channel (8) is provided in the middle of the bucket tooth seat (1). The unlocking channel (8) is located at the rear end of the connecting hole (7) and is vertically communicated with the connecting hole (7). A plurality of anti-disengagement arc pieces (9) are fixedly connected in the connecting hole (7). The arc-shaped triangular blocks (5) cooperate with the anti-disengagement arc pieces (9) to fix the connecting rod (4) in the connecting hole (7). A fixing component is provided in the unlocking channel (8) for driving the connecting rod (4) to rotate and lock.

2. An excavator bucket tooth assembly with reliable connection according to claim 1, Characterized in that: The fixing component includes a spur gear fixedly connected to the end of the connecting rod (4) and a spur rack slidably connected in the unlocking channel (8). The spur gear at the end of the connecting rod (4) passing through the connecting hole (7) meshes with the spur rack.

3. An excavator bucket tooth assembly with reliable connection according to claim 1, Characterized in that: The fixing component includes a square hole (10) provided at the end of the connecting rod (4) and a driving rod (11) rotatably connected in the connecting hole (7). A square rod (12) is fixedly connected to the inner end of the driving rod (11). An internal gear (13) is fixedly connected to the outer end of the driving rod (11). An internal rack (14) is slidably connected in the unlocking channel (8). The internal rack (14) meshes with the internal gear (13).

4. An excavator bucket tooth assembly with reliable connection according to claim 3, Characterized in that: A protective ring (15) is rotatably connected between the outside of the driving rod (11) and the inside of the connecting hole (7). Two rear blocking strips (16) are fixedly connected to the inner end of the protective ring (15). An external gear (17) is fixedly connected to the outer end of the protective ring (15). An external rack (18) is slidably connected in the unlocking channel (8). The external gear (17) meshes with the external rack (18).

5. An excavator bucket tooth assembly with reliable connection according to claim 4, Characterized in that: A balance piece (19) is fixedly connected to the side wall of the rear blocking strip (16). A balance groove (20) is provided in the connecting hole (7). The balance piece (19) is slidably fitted in the balance groove (20). A sequential groove (21) is provided on the side of the external rack (18) adjacent to the internal rack (14). A sequential rod (22) is fixedly connected to the side of the internal rack (14) adjacent to the external rack (18). The sequential rod (22) is slidably fitted in the sequential groove (21).

6. An excavator bucket tooth assembly with reliable connection according to claim 5, Characterized in that: The middle parts of the outer rack (18) and the inner rack (14) are both threadedly connected with positioning screws (23), and the positioning screws (23) are rotatably connected in the unlocking channel (8).

7. A reliable connection excavator bucket tooth assembly according to claim 6, characterized in that: One side of the unlocking channel (8) is closed, and the other side is rotatably connected with a protective cover (24).

8. A reliable connection excavator bucket tooth assembly according to claim 1, characterized in that: The inner plug (6) is trapezoidal, and the sleeving cavity (3) has a shape adapted to the inner plug (6).

9. A reliable connection excavator bucket tooth assembly according to claim 1, characterized in that: A transfer seat (25) is fixedly connected in the sleeving cavity (3), the connecting rod (4) is rotatably connected in the transfer seat (25), the end of the connection hole (7) is a counterbore (26), and the transfer seat (25) matches the counterbore (26).

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