Mining excavator front shovel bucket and excavator

Abstract

This invention discloses a front shovel bucket for a mining excavator and the excavator itself. The bucket is connected to the front of the stick and extends or retracts under the action of the stick. A lifting beam is connected to the bucket body and is connected to a wire rope for lifting or lowering under the action of the wire rope. The bucket body includes a bucket body and a bucket lip. The bucket lip is located at the front of the bucket body and has an overall arc-shaped structure. The bucket lip includes a left bucket lip, a middle bucket lip, and a right bucket lip, with the left and right bucket lips connected to the two sides of the middle bucket lip. Multiple bucket teeth and protective sleeves are spaced apart on the upper part of the bucket lip. The large arc-shaped bucket lip avoids stress concentration, reduces the probability of defects, and reduces downtime and maintenance costs caused by bucket lip failure.

Description

Technical Field

[0001] This invention relates to the field of mining equipment technology, and in particular to a front shovel bucket for a mining excavator and the excavator itself. Background Technology

[0002] Mining machinery, specifically front shovel excavators (hereinafter referred to as excavators), rely on the bucket to directly excavate materials, and the bucket is an important component of the excavator.

[0003] The existing bucket lip design is a "U"-shaped structure, which is prone to tearing at the corners, especially when excavating materials with high hardness, greatly reducing the bucket's service life. In cold winters, when excavating sticky materials, the material's poor flowability causes it to stick to the sides, accumulating and reducing the product's working efficiency. Summary of the Invention

[0004] To address some or all of the technical problems existing in the prior art, this invention provides a front shovel bucket for a mining excavator and an excavator. The technical solution is as follows:

[0005] In a first aspect, a front shovel bucket for a mining excavator is provided. The bucket is connected to the front of the stick and extends or retracts under the action of the stick. A lifting beam is connected to the bucket body and is connected to a wire rope for lifting or lowering under the action of the wire rope. The bucket body includes a bucket body and a bucket lip. The bucket lip is located at the front of the bucket body and has an overall arc-shaped structure. The bucket lip includes a left bucket lip, a middle bucket lip, and a right bucket lip. The left bucket lip and the right bucket lip are connected to the two sides of the middle bucket lip. Multiple bucket teeth and protective sleeves are spaced apart on the upper part of the bucket lip.

[0006] In some alternative implementations, the angle of inclination of the bucket lip relative to the inner side of the bucket body is 10°.

[0007] In some alternative implementations, the lifting beam includes a lifting beam body, a lifting beam pin, and a fixing rope frame; the lifting beam body has an inverted "U" shaped structure, and the two sides of the lifting beam body are connected to the two sides of the bucket body by the lifting beam pin; the fixing rope frame is located in the middle of the lifting beam body, and the wire rope is fixed to the lifting beam body by the fixing rope frame.

[0008] In some optional implementations, there are two fixed rope frames, which are symmetrically distributed in the middle of the lifting beam body. Each fixed rope frame is provided with at least three through holes. The fixed rope frame is connected to the lifting beam body at one of the through holes by bolts, and to the lifting beam body at the other through hole by a pin and a pin shaft.

[0009] In some alternative implementations, the through hole selected when the fixed rope frame is connected to the lifting beam body is related to the degree of eccentricity of the lifting beam, the two bolts are installed in different positions on the fixed rope frame so that the two bolts are at the same position from the eccentric axis of the lifting beam, and the two pins are installed in different positions so that the two pins are at the same position from the eccentric axis of the lifting beam.

[0010] In some alternative implementations, the rear part of the bucket body is hinged to the stick, and an adjustable tie rod is provided between the stick and the bucket body. The adjustable tie rod includes a first tie rod, a second tie rod, and a connecting cylinder. The ends of the first tie rod and the second tie rod are provided with bushings for connecting to the bucket body and the stick, respectively. The lengths of the first tie rod and the second tie rod are adjustable.

[0011] In some alternative implementations, the first and second pull rods are provided with grooves at the insertion points of the connecting cylinder, and the connecting cylinder is provided with screw holes. Bolts pass through the connecting cylinder and are inserted into the grooves to fix the first and second pull rods.

[0012] In some alternative implementations, a chain assembly is also included, comprising a first chain, a second chain, a chain connector, and a shackle; one end of the first chain is connected to an opening lever device on the bucket rod via the chain connector for adjusting the length of the first chain, and the other end of the first chain is connected to the opening lever via the shackle; one end of the second chain is connected to the first chain, and the other end is connected to the bottom of the bucket; the length of the first chain is greater than the length of the second chain.

[0013] In some alternative implementations, the chain connector has a U-shaped hole through which a first chain passes, and the first chain is fixed to the chain connector by bolts.

[0014] In a second aspect, an excavator is provided, including a mining excavator front shovel bucket as described in any of the preceding claims.

[0015] The main advantages of the technical solution of this invention are as follows:

[0016] The mining excavator front shovel bucket and excavator of this invention feature a large arc bucket lip that avoids stress concentration, reduces the probability of defects, and minimizes downtime and maintenance costs caused by bucket lip failure. The large arc bucket lip offers high reliability, long service life, universally compatible sheaths, and low spare parts storage costs. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and constitute a part of this invention, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of an excavator provided in an embodiment of the present invention;

[0019] Figure 2 This is a front view of a mining excavator front shovel bucket provided in an embodiment of the present invention;

[0020] Figure 3 This is a view from direction A of a mining excavator front shovel bucket provided in an embodiment of the present invention;

[0021] Figure 4 This is a left view of a front shovel bucket for a mining excavator according to an embodiment of the present invention;

[0022] Figure 5 The image shows a right view of a front shovel bucket for a mining excavator according to an embodiment of the present invention.

[0023] Figure 6 A partial cross-sectional view of a front shovel bucket for a mining excavator provided in an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of the bucket body of a mining excavator front shovel bucket according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the bucket lip of a front shovel bucket for a mining excavator according to an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the lifting beam of a front shovel bucket for a mining excavator according to an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the lifting beam pin of a mining excavator front shovel bucket according to an embodiment of the present invention;

[0028] Figure 11 A schematic diagram of the fixing rope frame for a front shovel bucket of a mining excavator provided in an embodiment of the present invention;

[0029] Figure 12 A schematic diagram of an adjustable tie rod for a mining excavator front shovel bucket according to an embodiment of the present invention;

[0030] Figure 13 This is a schematic diagram of the chain assembly of a front shovel bucket for a mining excavator according to an embodiment of the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0032] The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] In a first aspect, embodiments of the present invention provide a front shovel bucket for a mining excavator, such as... Figure 1 As shown, the excavator bucket 100 is connected to the front of the boom 200. It is raised and lowered by the lifting wire rope 300 on the lifting beam. The lower rack of the boom 200 meshes with the pushing mechanism on the boom 400. Driven by the pushing mechanism, the boom 200 is extended or retracted, thus completing the movement of the bucket 100.

[0034] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The excavator bucket 100 shown includes a bucket bottom 1, a bucket bolt 2, bucket teeth 3, a protective sleeve 4, a bucket opening lever 5, a fixing plate 6, a pin 7, a bolt 8, an anti-loosening washer 9, a bucket body 10, a lifting beam 20, an adjustable tie rod 30, a chain assembly 40, a bucket pin baffle 50, etc.

[0035] The bucket body 10 includes a bucket body 11, a bucket lip 12, a bucket bolt socket 13, and a bushing 14. Please refer to [link / reference needed]. Figure 7 The bushing 14 is a core sleeve installed at the lifting beam connection hole of the bucket body 10, and is installed at an angle of 45°. The bucket lip 12 is welded to the front of the bucket body 11, and the bucket bolt socket 13 is welded to the rear of the bucket body 11. The bucket bolt socket 13 has a hole in the middle for fixing the bucket bolt 2, and two connecting through holes on both sides for connecting the fixing plate 6.

[0036] like Figure 8 The bucket lip 12 shown adopts a large arc design. Different arcs are set according to the bucket capacity, making it less prone to material sticking at the included angle on both sides of the lip, thus shortening the material filling time. The large arc bucket lip 12 consists of three parts: a left bucket lip 121, a middle bucket lip 122, and a right bucket lip 123. The angle of the bucket lip 12 is 10°. The various parts of the bucket lip 12 are first welded together, and then welded as a whole to the front of the bucket body 10. The large arc bucket lip 12 has connection holes for installing the bucket teeth 3 and the protective sleeve 4. All protective sleeves 4 are universal.

[0037] like Figure 9 The lifting beam 20 shown includes a lifting beam body 21, a lifting beam pin 22, a fixing rope frame 23, a pin 24, a pin shaft 25, a long bolt 26, a nut 27, and a cotter pin 28, etc.

[0038] like Figure 10 The lifting pin 22 shown includes a pin 221 and two clamps 222. The pin 221 has grooves on both sides for placing the clamps 222. The clamps 222 are of a split structure and are fixed to the pin 221 by bolts to form a whole structure.

[0039] like Figure 11 The fixed rope frame 23 shown has a first through hole, a second through hole, and a third through hole. To accommodate the eccentric structure of the lifting beam 20, the fixed rope frames 23 on both sides can use the first and second through holes as connection holes on one side and the second and third through holes on the other side. For example, due to the eccentricity of the inner and outer sides of the lifting beam 20, the fixed rope frame 23 on one side is connected to the lifting beam body 21 at the first through hole by a long bolt 26, and the fixed rope frame 23 on the other side is connected to the lifting beam body 21 at the second through hole by a long bolt 26. When the second through hole on the fixed rope frame 23 on one side of the lifting beam 20 is connected to the lifting beam body 21 by a pin 24 and the pin shaft 25 is fixed to the fixed rope frame 23, the pin 24 of the fixed rope frame 23 on the other side passes through the third through hole and is fixed to the lifting beam body 21, and the pin shaft 25 connects the fixed rope frame 23 and the pin 23 together. A cotter pin 28 may also be provided at the end of the pin 25 to fix the pin 25.

[0040] The lifting beam body 21 is connected to the bucket body 10 via lifting beam pins 22 using four ear plates. It is connected to the lifting wire rope 300 via D-shaped pulleys on both sides of the lifting beam 20. After the lifting wire rope 300 is installed, one through hole of the fixed rope frame 23 on one side is connected to the lifting beam body 21 via a long bolt 26, and the other through hole is connected to the lifting beam body 21 via a pin 24 and a pin 25. On the other side, one through hole of the fixed rope frame 23 is connected to the lifting beam body 21 via a long bolt 26, and the other through hole is connected via a pin 24 and a pin 25. A cotter pin 28 is provided at the end of the pin 25 to secure it. The selection of the through holes is based on relative eccentric shaft symmetry.

[0041] like Figure 12The adjustable pull rod 30 shown includes a first pull rod 31, a second pull rod 32, a connecting cylinder 33, and a bushing 34. The first pull rod 31 and the second pull rod 32 are each fitted with a bushing 34 at one end, and the other end has four grooves circumferentially distributed in the horizontal and vertical planes for locking with bolts when the pull rod 30 is adjusted to the working position. The connecting cylinder 33 has two sets of threaded holes in the horizontal and vertical planes, each set including four threaded holes distributed circumferentially for bolt fixing. Additionally, the connecting cylinder 33 may also have a swivel hole, facilitating the insertion of a wrench to adjust the position of the adjustable pull rod 30.

[0042] The adjustable tie rod 30 is adjustable in length. Depending on the bucket capacity and the material being excavated by each excavator, the length of the tie rod 30 can be increased or decreased by adjusting the lengths of the first tie rod 31 and the second tie rod 32 inserted into the connecting cylinder 33, thus meeting the material loading requirements of the excavator bucket. Once the length is properly adjusted, bolts are used to lock the grooves on the first tie rod 31 and the second tie rod 32.

[0043] like Figure 13 The chain assembly 40 shown includes a first chain 41 (i.e., a long chain), a second chain 42 (i.e., a short chain), a chain connector 43, a shackle 44, etc.

[0044] In the chain assembly 40, the lower part of the first chain 41 is connected to the bucket opening lever 5 via a shackle 44, and the second chain 42 is connected to the middle of the first chain 41 on one side and fixed to the bucket bottom 1 on the other side. The chain connecting frame 43 is fixed to the bucket opening lever device 500 on the boom 200. The length of the first chain 41 required for the excavator to open the bucket is adjusted by the chain connecting frame 43, and then fixed with bolts after adjustment.

[0045] The chain connecting frame 43 is connected to the bucket opening lever device 500, and has a U-shaped hole in the middle. The width of the hole is slightly larger than the diameter of the first chain 41 to ensure that the first chain 41 can pass through smoothly. The first chain 41 passes through the U-shaped hole on the chain connecting frame 43 and is fixed with bolts. Loosening the bolts and pulling the first chain 41 can adjust the length of the first chain 41 between the chain connecting frame 43 and the shackle 44. After adjustment, it is tightened with bolts again.

[0046] The bucket pin baffle 50 includes an upper baffle 51, a lower baffle 52, bolts 53, nuts 54, and cotter pins 75. The upper baffle 51 and lower baffle 52 are welded onto the bucket body 11. After the pins 7 are installed, only two bolts 53 need to be installed on each side of each pin 7, and secured with nuts 54 and cotter pins 55. The two bolts 53 are a certain distance from the center of the pin 7 to facilitate lubrication of the bucket pins 7.

[0047] The bucket fixing plate 6 has two threaded connection holes. The head of the connecting bolt 8 is installed in the countersunk hole of the bucket bolt socket 13 and is equipped with an anti-loosening washer 9 to connect with the fixing plate 6, so as to avoid the impact of material on the head of the bolt 8 and improve the reliability of the connection.

[0048] In summary, the beneficial effects of the front shovel bucket for mining excavators provided in the embodiments of the present invention are as follows:

[0049] (1) The large arc bucket lip 12 of the bucket of the present invention avoids stress concentration, reduces the probability of defects, and reduces downtime and maintenance costs caused by bucket lip 12 failure. The large arc bucket lip 12 has high reliability, long service life, universal sleeve, and low spare parts storage cost.

[0050] (2) The bucket lifting beam 20 of the present invention adopts a non-balanced beam mechanism, which avoids stress concentration and has a high unloading height; the lifting beam pin 22 adopts a double clamp structure, which has a long service life; the fixing rope frame 23 adopts a bolt connection and a pin 24 to cooperate with the pin shaft 25 for fixing, which is convenient for maintenance.

[0051] (3) The present invention adopts an adjustable tie rod 30 design, which can adjust the length according to different bucket capacities to reduce digging resistance.

[0052] (4) The chain connecting frame 43 of the present invention facilitates on-site chain adjustment; the bucket fixing plate 6 adopts a threaded hole structure, and the bucket pin baffle 50 adopts a bolt connection structure, which reduces maintenance and costs.

[0053] Secondly, embodiments of the present invention provide an excavator, including a mining excavator front shovel bucket as described in any of the preceding claims.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, the terms "front," "back," "left," "right," "upper," and "lower" in this document refer to the placement shown in the accompanying drawings.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A front shovel type bucket for a mining excavator, wherein the bucket is connected to the front part of the stick and extends or retracts under the action of the stick, and a lifting beam is connected to the bucket body, the lifting beam being connected to a wire rope for lifting or lowering under the action of the wire rope, characterized in that... The bucket body includes a bucket body and a bucket lip. The bucket lip is located at the front of the bucket body and has an overall arc-shaped structure. The bucket lip includes a left bucket lip, a middle bucket lip, and a right bucket lip. The left bucket lip and the right bucket lip are connected to the two sides of the middle bucket lip. The upper part of the lip is provided with multiple fangs and sheaths at intervals; The rear part of the bucket body is hinged to the bucket rod. An adjustable tie rod is provided between the bucket rod and the bucket body. The adjustable tie rod includes a first tie rod, a second tie rod, and a connecting cylinder. The ends of the first tie rod and the second tie rod are provided with bushings for connecting to the bucket body and the bucket rod, respectively. The lengths of the first tie rod and the second tie rod are adjustable. The parts of the first tie rod and the second tie rod that insert into the connecting cylinder are provided with grooves. The connecting cylinder is provided with screw holes. Bolts pass through the connecting cylinder and are inserted into the grooves to fix the first tie rod and the second tie rod. Depending on the bucket capacity and the material being excavated, the length of the first and second tie rods inserted into the connecting cylinder can be adjusted to increase or decrease the length of the tie rods accordingly, thus meeting the material loading requirements of different excavator buckets. Once the length is properly adjusted, the grooves on the first and second tie rods are locked in place by bolts. It also includes a chain assembly, which comprises a first chain, a second chain, a chain connecting frame, and a shackle; one end of the first chain is connected to the bucket opening lever device on the bucket rod via the chain connecting frame for adjusting the length of the first chain, and the other end of the first chain is connected to the bucket opening lever via the shackle; one end of the second chain is connected to the first chain, and the other end is connected to the bottom of the bucket; the length of the first chain is greater than the length of the second chain; the chain connecting frame is provided with a U-shaped hole for the first chain to pass through, and the first chain is fixed to the chain connecting frame by bolts.

2. The mining excavator front shovel bucket according to claim 1, characterized in that, The angle of inclination of the lip relative to the inner side of the bucket body is 10°.

3. The mining excavator front shovel bucket according to claim 1, characterized in that, The lifting beam includes a lifting beam body, a lifting beam pin, and a fixing rope frame; The lifting beam body has an inverted "U" shaped structure. The two sides of the lifting beam body are connected to the two sides of the bucket body by the lifting beam pin. The fixing rope frame is set in the middle of the lifting beam body, and the wire rope is fixed to the lifting beam body by the fixing rope frame.

4. The mining excavator front shovel bucket according to claim 3, characterized in that, There are two fixed rope frames, which are symmetrically distributed in the middle of the lifting beam body. Each fixed rope frame is provided with at least three through holes. The fixed rope frame is connected to the lifting beam body through one of the through holes by bolts, and to the lifting beam body through a pin and a shaft through the other through hole.

5. The mining excavator front shovel bucket according to claim 4, characterized in that, The through hole selected when the fixed rope frame is connected to the lifting beam body is related to the degree of eccentricity of the lifting beam. The two bolts are installed in different positions on the fixed rope frame so that the two bolts are at the same distance from the eccentric axis of the lifting beam. The two pins are installed in different positions so that the two pins are at the same distance from the eccentric axis of the lifting beam.

6. An excavator, characterized in that, Including the front shovel bucket of a mining excavator as described in any one of claims 1-5.

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