CN112281976A

CN112281976A - Excavator bucket tooth assembly connecting piece

Info

Publication number: CN112281976A
Application number: CN202011220479.1A
Authority: CN
Inventors: 陶建良
Original assignee: Nantong Jianhui Trading Co ltd
Current assignee: Nantong Jianhui Trading Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-01-29

Abstract

The invention provides a connecting piece of a bucket tooth assembly of an excavator, which comprises a buffer plate, a fixed shell, a buffer end and a connector, wherein the fixed shell is fixedly connected with the buffer plate, the buffer plate is provided with a second through hole, the inner wall of the fixed shell is symmetrically provided with slide rails, the slide rails are provided with slide blocks in a sliding way, one side of the buffer end is fixedly provided with the connector, the other side of the buffer end is fixedly provided with a shaft, the two sides of the shaft are respectively provided with a first shoulder part and a second shoulder part, the shaft is provided with a sleeve, the sleeve is provided with a fixing device corresponding to the sliding block, the sliding block is hinged with one end of a first connecting rod, the other end of the first connecting rod is hinged with one end of a locking rod, the other end of the locking rod is hinged on the sleeve, the middle of the locking rod is hinged with one end of a second connecting rod, the other end of the second connecting rod is hinged with a circular ring, a hexagonal screw hole is formed in the AB surface of the second shoulder, and a lock head is arranged on the fixing rod. The invention can improve and strengthen the strength of the bucket teeth and the strength of the tooth holder.

Description

Excavator bucket tooth assembly connecting piece

Technical Field

The invention belongs to the field of engineering machinery, and particularly relates to a connecting piece for a bucket tooth assembly of an excavator.

Background

The excavator is a mechanical device commonly used in the existing engineering construction, is widely used for the excavator, greatly accelerates the progress of the engineering construction, reduces the manpower, can exert better excavating performance in the aspect that some manpower can not reach, and is also an important reason that the excavator can be used for the engineering construction.

The excavator comprises an excavator body and an operation arm, the excavator body plays roles in walking, rotating, supporting and controlling, the operation arm comprises a movable arm, a bucket rod, a bucket and an oil cylinder for driving work, the operation arm plays roles in excavating and carrying, a bucket tooth assembly for crushing is arranged on the bucket, and the bucket tooth assembly comprises a bucket tooth and a tooth holder.

However, the existing bucket teeth and tooth holders are generally in a mode of forming holes in the bucket teeth, the bucket teeth are fixed on the tooth holders by the aid of the pin shafts penetrating through the through holes, and the strength of the surfaces of the bucket teeth is often damaged due to the fact that the through holes need to be formed in the upper side surface, the lower side surface or the left side surface and the right side surface of the bucket tooth part at the foremost end, and accordingly the strength of the bucket teeth is reduced.

Disclosure of Invention

In view of the above technical problems, the present invention provides an excavator tooth assembly connecting member, which aims to enhance the strength of a tooth assembly, particularly the strength of a tooth, and the tooth of the present invention is suitable for large excavators, such as large mining excavators or large mining shovels.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the connecting piece 3 of the excavator bucket tooth assembly is used for connecting a bucket tooth 1 and a tooth base 2, the connecting piece 3 comprises a buffer plate 7, a fixed shell 8, a buffering end 9 and a connector 10, the fixed shell 8 is fixedly connected with the buffer plate 7, a second through hole 11 is formed in the buffer plate 7, the fixed shell 8 is provided with a second cavity 12, slide rails 13 are symmetrically arranged on the inner wall of the fixed shell 8, sliding blocks 14 are slidably arranged on the slide rails 13, the connector 10 is fixed on one side of the buffering end 9, a shaft 15 is fixed on the other side of the buffering end 9, a first shoulder 17 and a second shoulder 18 are respectively arranged on two sides of the shaft 15, a sleeve 16 is arranged on the shaft 15, the sleeve 16 can rotate relative to the shaft 15, a fixing device 19 corresponding to the sliding block 14 is arranged on the sleeve 16, one end of a first connecting rod 20 is hinged to the sliding block 14, the other end of the first connecting rod 20 is hinged to one end of a locking rod 21, the other end of the locking rod 21 is hinged to the sleeve 16, the middle of the locking rod 21 is hinged to one end of a second connecting rod 22, the other end of the second connecting rod 22 is hinged to a circular ring 23, a hexagonal screw hole is formed in the AB surface of the second shoulder 18, a lock head 24 is arranged on the fixing rod 21, and the lock head 24 is used for being fixed on the fixing device 19.

Further, bucket tooth 1 has first cavity 5 and hole groove 6, hole groove 6 is the screw hole, set up the external screw thread on the connector 10, connector 10 uses with the cooperation of hole groove 6, be provided with first through-hole 4 on toothholder 2, first through-hole 4 is used for fixing toothholder 2 on the scraper bowl, be provided with boss 27 on the end of toothholder 2, boss 27 is the annular, boss 27 cooperates with slider 14 when the installation.

Further, the fixing device 19 includes a locking block 25 fixed on the sleeve 16, and a latch 26 disposed on the locking block 25, wherein the latch 26 is used for clamping the locking head 24.

Further, the second shoulder 18 is circular, and the outer diameter of the first shoulder 18 is smaller than the inner diameter of the ring 23, so that the ring 23 can accommodate the first shoulder 18 after installation.

Further, the slide rails 13 and the sliders 14 are provided with four.

Further, a plurality of small-bore through holes are formed in the buffer plate 7, so that the buffer plate 7 is used for buffering impact force between the bucket tooth 1 and the tooth holder 2, and a plurality of circular grooves 28 are formed in the buffer end 9 through a drill, so that the buffer end 9 is used for absorbing vibration of the bucket tooth 1 at the front end.

Further, the circular groove 28 is uniformly arranged on the buffer end 9, and the circular groove 28 is filled with an elastic member, which is stuck in the circular groove 28.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention can improve and strengthen the strength of the bucket teeth and the strength of the tooth holder;

2. the bucket tooth assembly is suitable for bucket tooth assemblies in the prior art, holes formed in the bucket teeth in the prior art are supplemented, the strength of the bucket teeth is improved, then hole grooves are formed in the bucket teeth, and bosses are machined on tooth holders so as to be suitable for connecting pieces in the application;

3. the invention can reduce the holes arranged at the outer side of the bucket tooth, the surface of the bucket tooth can keep the original streamline shape, and the phenomenon of stress concentration suddenly appearing at a certain position due to the requirement of connection can be avoided.

Drawings

FIG. 1 is a schematic view of the overall installation of the present invention;

FIG. 2 is an overall three-part schematic of the present invention;

FIG. 3 is a schematic view of the tooth structure of the present invention;

FIG. 4 is a first schematic view of a connector according to the present invention;

FIG. 5 is a second schematic view of a connector structure according to the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5 in accordance with the present invention;

FIG. 7 is an enlarged view of portion B of FIG. 6 in accordance with the present invention;

FIG. 8 is a schematic view of a tooth holder according to the present invention;

FIG. 9 illustrates the connector installation process of the present invention;

FIG. 10 is a schematic view of the tooth of the present invention mounted to a tooth holder;

FIG. 11 is an enlarged view of portion C of FIG. 10 in accordance with the present invention;

FIG. 12 is a schematic view of the internal structure of the tooth of the present invention mounted to the tooth holder;

FIG. 13 is an enlarged view of portion D of FIG. 12 in accordance with the present invention;

FIG. 14 is a view of the connector of the present invention with a circular groove;

in the figure, the bucket tooth 1, the tooth holder 2, the connecting piece 3, the first through hole 4, the first cavity 5, the hole groove 6, the buffer plate 7, the fixed shell 8, the buffer end 9, the connecting head 10, the second through hole 11, the second cavity 12, the sliding rail 13, the sliding block 14, the shaft 15, the sleeve 16, the first shoulder 17, the second shoulder 18, the fixing device 19, the first connecting rod 20, the locking rod 21, the second connecting rod 22, the circular ring 23, the locking head 24, the locking block 25, the lock catch 26, the boss 27 (circular) and the circular groove 28 are arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected or detachably connected; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Fig. 1 shows a tooth assembly of the present invention, which includes a tooth 1, a tooth holder 2 and a connecting member 3, wherein the connecting member 3 is used for connecting the tooth 1 and the tooth holder 2.

As shown in fig. 2, which is a schematic view of three main components of the present invention, the connector 3 includes a buffer plate 7, a fixed case 8, a buffer end 9 and a connection head 10,

as shown in fig. 4-7, the fixed shell 8 is fixedly connected to the buffer plate 7, the buffer plate 7 is provided with a second through hole 11, the fixed shell 8 has a second cavity 12, the inner wall of the fixed shell 8 is symmetrically provided with slide rails 13, the slide rails 13 are slidably provided with sliders 14, one side of the buffer end 9 is fixed with a connector 10, the other side of the buffer end 9 is fixed with a shaft 15, two sides of the shaft 15 are respectively provided with a first shoulder 17 and a second shoulder 18, the shaft 15 is provided with a sleeve 16, the sleeve 16 can rotate relative to the shaft 15, the sleeve 16 is provided with a fixing device 19 corresponding to the slider 14, the slider 14 is hinged to one end of a first link 20, the other end of the first link 20 is hinged to one end of a locking lever 21, the other end of the locking lever 21 is hinged to the sleeve 16, the middle of the locking lever 21 is hinged to one end of a second link 22, the other end of the second connecting rod 22 is hinged to the ring 23, a hexagonal screw hole is formed in the surface AB of the second shoulder 18, a locking head 24 is arranged on the fixing rod 21, and the locking head 24 is used for being fixed on the fixing device 19.

As shown in fig. 3, in order to match the connecting piece 3, a hole groove 6 is formed in a side wall of the first cavity 5 of the bucket tooth 1, the hole groove 6 is arranged at a position shown in fig. 3, the position is opposite to a tooth tip of the bucket tooth 1, the hole groove 6 is a threaded hole, an external thread is formed on the connecting head 10, and the connecting head 10 is matched with the hole groove 6 for use. As shown in fig. 8, a first through hole 4 is formed in the toothholder 2, the first through hole 4 is used for fixing the toothholder 2 to the bucket (in a manner of matching a screw and a nut), a boss 27 is formed in an end of the toothholder 2, the boss 27 is annular, the boss 27 is matched with the slider 14 when being installed, and the slider 14 is clamped on the boss 27 to realize fixation.

As shown in fig. 7, the fixing device 19 includes a locking block 25 fixed on the sleeve 16, and a latch 26 provided on the locking block 25, the latch 26 being for snapping the locking head 24.

As shown in fig. 12 and 13, the second shoulder 18 is circular, and the outer diameter of the first shoulder 18 is smaller than the inner diameter of the ring 23, so that the ring 23 can accommodate the first shoulder 18 after installation.

The slide rail 13 and the slide block 14 are provided with four.

The buffer plate 7 is provided with a plurality of small-aperture through holes (not shown in the figure), so that the buffer plate 7 is used for buffering the impact force between the bucket tooth 1 and the tooth holder 2, the buffer plate 7 can effectively improve the strength of the bucket tooth and the tooth holder, the impact force can be improved by 50% in impact tests and simulation tests for the bucket tooth, and the impact force can be improved by nearly 30% in the impact tests and simulation tests for the tooth holder.

As shown in fig. 14, a plurality of circular grooves 28 are formed in the buffer end 9 by a drill, so that the buffer end 9 serves to absorb the shock of the tooth 1 at the tip. The circular grooves 28 are uniformly arranged on the buffer end 9, and the circular grooves 28 are filled with elastic members which are adhered in the circular grooves 28. When only the plurality of circular grooves 28 are provided, the shock when the bucket tooth receives the impact can be absorbed, and when the elastic member is provided in the plurality of circular grooves 28, the shock can be reduced by 40%. As shown in fig. 14, the buffer end 9 is in a nearly conical shape, and 5 circles of circular grooves 28 are provided therein, it is found by experiments of the present invention (as shown in fig. 14, the circular grooves 28 are divided into a first circle of grooves, a second circle of grooves, a third circle of grooves, a fourth circle of grooves and a fifth circle of grooves from left to right), when elastic members are filled in the first circle of grooves and the second circle of grooves, 30% of vibration can be reduced, when elastic members are continuously filled in the third circle of grooves, 38% of vibration can be reduced, and when elastic members are continuously filled in the fourth circle of grooves and the fifth circle of grooves, 39% and 40% of vibration can be reduced, so that it can be found that the position of the circular groove 28 should be set to the left end of the buffer end 9 as far as possible, and the capability of protecting the bucket teeth can be improved.

The installation mode of the invention is as follows: a hexagonal screwdriver penetrates through the second through hole 11 and is inserted into a hexagonal screw hole in the AB surface, the connector 12 is screwed into the hole groove 6, the outer side surface of the fixing shell 8 is attached to the inner side wall of the first cavity 5 of the bucket tooth 1 in the process, and the connecting piece 3 is fixed on the bucket tooth 1 at the moment; then insert on toothholder 2 again, the terminal surface and the ring 23 butt of the left end (as shown in fig. 8) of toothholder 2, because the outside diameter of terminal surface is greater than the interior circle diameter of ring 23, consequently ring 23 can be pushed to the tip of bucket tooth 1, continues to push ring 23, and in the in-process that continues to push, slider 14 and boss 27 butt (as shown in fig. 12, 13), tapered end 24 joint has realized fixedly on buckle 26 this moment. When the bucket tooth assembly needs to be disassembled, the lock head 24 can be separated from the lock catch only by clamping the bucket tooth through the external clamping claw and pulling out the bucket tooth, but direct rotation disassembly of the bucket tooth 1 is not recommended at this time, because the bucket tooth assembly is used for a long time at this time, and the bucket tooth 1 is connected with the connector 12 tightly, the connector is easy to damage by adopting the rotation of the bucket tooth 1 for disassembly, and the repeated use of the connecting piece 3 can be seriously damaged by adopting the disassembly of the rotation of the bucket tooth 1. The tooth assembly of the present invention (the sum of the tooth 1, the tooth holder 2, and the attachment 3) is suitable for a large excavator bucket, and therefore, the tooth assembly is also large.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A bucket tooth assembly which is characterized in that: the bucket tooth assembly comprises a bucket tooth (1), a tooth holder (2) and a connecting piece (3).

2. An excavator bucket tooth assembly connecting piece (3), connecting piece (3) are used for connecting bucket tooth (1) and toothholder (2), its characterized in that: the connecting piece (3) comprises a buffer plate (7), a fixed shell (8), a buffering end (9) and a connector (10), the fixed shell (8) is fixedly connected with the buffer plate (7), a second through hole (11) is formed in the buffer plate (7), the fixed shell (8) is provided with a second cavity (12), slide rails (13) are symmetrically arranged on the inner wall of the fixed shell (8), a sliding block (14) is slidably arranged on the slide rails (13), the connector (10) is fixed on one side of the buffering end (9), a shaft (15) is fixed on the other side of the buffering end (9), a first shoulder (17) and a second shoulder (18) are respectively arranged on two sides of the shaft (15), a sleeve (16) is arranged on the shaft (15), the sleeve (16) can rotate relative to the shaft (15), a fixing device (19) corresponding to the sliding block (14) is arranged on the sleeve (16), the one end of articulated first connecting rod (20) on slider (14), the other end of first connecting rod (20) is articulated with the one end of locking lever (21), the other end of locking lever (21) articulates on sleeve (16), the one end of the articulated second connecting rod (22) in middle part of locking lever (21), the other end and ring (23) of second connecting rod (22) are articulated, the hexagonal screw has been seted up on the AB face of second shoulder (18), be provided with tapered end (24) on dead lever (21), tapered end (24) are used for fixing on fixing device (19).

3. The excavator tooth assembly attachment of claim 2, wherein: bucket tooth (1) has first cavity (5) and hole groove (6), hole groove (6) are the screw hole, set up the external screw thread on connector (10), connector (10) use with hole groove (6) cooperation, be provided with first through-hole (4) on toothholder (2), first through-hole (4) are used for fixing toothholder (2) on the scraper bowl, be provided with boss (27) on the end of toothholder (2), boss (27) are the annular, boss (27) when the installation with slider (14) cooperation.

4. The excavator tooth assembly attachment of claim 3, wherein: the fixing device (19) comprises a locking block (25) fixed on the sleeve (16) and a lock catch (26) arranged on the locking block (25), and the lock catch (26) is used for clamping the lock head (24).

5. The excavator tooth assembly attachment of claim 4, wherein: the second shoulder (18) is circular, and the outer diameter of the first shoulder (18) is smaller than the inner diameter of the ring (23), so that the ring (23) can accommodate the first shoulder (18) after installation.

6. The excavator tooth assembly attachment of claim 5, wherein: the four sliding rails (13) and the four sliding blocks (14) are arranged.

7. The excavator tooth assembly attachment of claim 6, wherein: a plurality of small-aperture through holes are formed in the buffer plate (7), so that the buffer plate (7) is used for buffering impact force between the bucket teeth (1) and the tooth holder (2), and a plurality of circular grooves (28) are machined in the buffer end (9) through a drill bit, so that the buffer end (9) is used for absorbing vibration of the bucket teeth (1) at the front end.

8. The excavator tooth assembly attachment of claim 7, wherein: the round grooves (28) are uniformly arranged on the buffer end (9), and elastic pieces are filled in the round grooves (28) and are adhered in the round grooves (28).