Mud scraping structure and trenching machine

Abstract

The utility model relates to the technical field of operation machinery, and discloses a mud scraping structure and a trenching machine, and the mud scraping structure comprises a mounting frame, a mud scraping plate, a mud scraping plate and a mud scraping plate, the mud scraping assemblies are arranged on the two opposite sides of the mounting frame and suitable for being arranged opposite to the inner side wall of the grab bucket. The impact teeth are arranged at the bottom of the mounting frame and have a shielding state and an exposed state, in the shielding state, the impact teeth are located in the inner space of the grab bucket, and in the exposed state, the grab bucket is opened, so that tooth tips of the impact teeth protrude out of the grab bucket. According to the grab bucket, the problems that the grab bucket cannot be smoothly closed and the mud scraping plate is easy to collide and damage when the grab bucket encounters a relatively hard soil layer or a relatively large stone are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of operating machinery, in particular to a mud scraping structure and a troughing machine. Background Art

[0002] A trenching machine, also known as a slotting machine, is a mechanical equipment commonly used for digging trenches downwards during the construction of underground continuous walls. The excavation device of the trenching machine includes a grab bucket, which can open and close under the drive of the hydraulic system, thereby excavating the soil and rock in the trench to realize trenching construction.

[0003] In the related art, since the soil and rocks in the trench are easily adhered to the inner wall of the grab bucket when the excavating device of the trenching machine grabs the soil and rocks in the trench, a scraper is usually provided in the grab bucket to separate the soil and rocks from the inner wall of the grab bucket.

[0004] However, with regard to the above-mentioned related technologies, for relatively hard soil layers or soil layers with large rocks, the grab structure cannot be closed smoothly after the grab falls, and the grab teeth, scraper plates and the installation structure of the scraper plates are easily worn or damaged when they collide with the hard soil layers or large rocks. Utility Model Content

[0005] In view of this, the utility model provides a mud scraping structure and a troughing machine to solve the problem that the grab bucket of the excavator arm encounters a relatively hard soil layer or large stones, resulting in the grab bucket being unable to close smoothly and the mud scraping plate being easily damaged by collision.

[0006] In the first aspect, the utility model provides a mud scraping structure for installation on the inner side of a grab bucket, comprising: a mounting frame; a mud scraping assembly, arranged on opposite sides of the mounting frame and suitable for being arranged opposite to the inner wall of the grab bucket; an impact tooth, arranged at the bottom of the mounting frame, having a shielded state and an exposed state, in which the impact tooth is located in the internal space of the grab bucket, and in which the grab bucket is opened so that the tooth tip of the impact tooth protrudes out of the grab bucket.

[0007] Beneficial effects: by setting up a mounting frame, a structural foundation for the installation of other structures is provided; by setting the impact teeth on the mounting frame, the scraper assembly is used to reduce the adhesion of soil materials to the inner wall of the grab bucket; when the grab bucket is opened and falls, the impact teeth first contact the soil layer to be excavated, and the tooth structure of the impact teeth impacts the soil layer, so that the hard soil layer or stone is broken and disintegrated, thereby facilitating the grab bucket to smoothly grab the soil layer, so that the grab bucket can not only work in a soft soil layer environment, but also can excavate hard soil layers or soil layers with stones; and because the impact teeth replace the bucket teeth, mounting frame and scraper blade of the grab bucket and other structures to first contact the hard soil layer or stone, the possibility of the scraper blade and other structures being damaged and broken by impact is greatly reduced, making the structure more reliable and extending the service life of the overall structure.

[0008] In an optional embodiment, the impact tooth includes a tooth seat and a tooth sleeve, the tooth seat is fixed on the mounting frame, and the tooth sleeve is detachably connected to the tooth seat.

[0009] Beneficial effect: By making the tooth sleeve and the tooth seat detachably connected, when the tooth sleeve is damaged or broken after long-term use, the tooth sleeve can be replaced and the scraper structure can be put into operation again without replacing the entire scraper assembly, thus saving the economic and time costs of maintenance. At the same time, since the impact tooth is light in weight and small in size compared to the entire scraper structure, it is more convenient for maintenance personnel to operate.

[0010] In an optional embodiment, the gear sleeve is provided with a mounting groove, the gear seat extends into the mounting groove, the inner side wall of the gear sleeve is provided with a clamping portion protruding inward, and a clamping groove is provided at a position on the gear seat that matches the clamping portion.

[0011] Beneficial effect: Through the setting of the installation groove, the tooth seat is inserted into the tooth sleeve, and the positioning of the tooth seat and the tooth sleeve is realized through the cooperation of the clamping part on the tooth sleeve and the clamping groove on the tooth seat, thereby realizing the detachable connection between the tooth sleeve and the tooth seat. When installing the tooth sleeve, firstly install the tooth sleeve without the clamping part on the tooth seat, and then squeeze or hammer the position on the tooth sleeve corresponding to the clamping groove by means of hydraulic pliers or the like, so that the inner side wall of the tooth sleeve bulges toward the inner side of the installation groove, forming the clamping part, thereby realizing the clamping fit.

[0012] In an optional embodiment, the gear seat and the gear sleeve are respectively provided with limit stops protruding toward each other at the notches of the mounting groove.

[0013] Beneficial effect: By setting two limit stops, the relative position of the gear seat and the gear sleeve is limited. At the same time, when the gear sleeve needs to be removed from the gear seat, the tooth tip part of the gear sleeve is hammered, and the hammering direction is from the limit stop direction of the gear sleeve to the limit stop direction of the gear seat, so that the gear sleeve forms a lever structure with the limit stop of the gear seat and the abutment of the gear sleeve as the fulcrum. During the hammering process, the lever structure amplifies the hammering force, thereby making it easy to separate the gear sleeve from the gear seat.

[0014] In an optional embodiment, the relatively arranged limit stops are both arranged in a semi-enclosed shape around the circumference of the gear seat and the gear sleeve, and the relatively arranged limit stops are interlocked with each other.

[0015] Beneficial effect: By setting mutually interlocking limit stops and making the limit stops semi-enclosed in the circumference of the gear seat, when the gear sleeve is disassembled by hammering, the other two limit stops are interlocked at two abutting positions to form a fulcrum of the lever structure and generate torque, thereby making the direction of deflection and disengagement of the gear sleeve more stable, avoiding damage to the gear seat during disassembly.

[0016] In an optional embodiment, the scraper assembly includes a scraper blade and a mounting seat, the scraper blade is fixed on the mounting seat, and the mounting seat is detachably connected to the mounting frame via a fastener.

[0017] Beneficial effect: The scraper is connected to the mounting frame through the mounting seat, and the scraper is located inside the grab bucket. When the grab bucket grabs the mud and releases the mud, the grab bucket opens. At this time, the inner wall of the grab bucket and the scraper move relative to each other, so that the mud adhering to the inside of the grab bucket is separated from the grab bucket. Since the mounting seat and the mounting frame are detachably connected, the same scraper structure can be adapted to grab buckets of different sizes and models by replacing mounting seats of different sizes, thereby improving the scope of application of the structure.

[0018] In an optional embodiment, the mounting frame includes a pair of base plates arranged opposite to each other and a first reinforcing plate and a mounting plate arranged between the pair of base plates, the base plates are fixedly connected to the fixing seat of the excavator arm, the first reinforcing plate is respectively fixedly connected to each of the base plates, the mounting plates are respectively fixedly connected to each of the base plates, and the impact teeth are arranged at the bottom of the mounting plates.

[0019] Beneficial effect: The main body of the mounting frame is formed by at least two substrates, and then the two or more substrates are connected by a first reinforcing plate, so that each substrate forms a whole and improves the overall structural strength, making the mounting frame structure more stable. By setting the mounting plate, while further improving the overall structural strength of the mounting frame, it also provides an installation foundation for the impact tooth.

[0020] In an optional embodiment, there are multiple impact teeth, and the multiple impact teeth are spaced apart and distributed along the width direction of the mounting frame.

[0021] Beneficial effect: By arranging multiple impact teeth at intervals on the mounting plate, the impact of the impact teeth on the soil layer is made more uniform, the force on the mounting frame is dispersed, and the reaction force of the soil layer on the impact teeth during the impact of the impact teeth on the soil layer is prevented from causing the excavator arm to deflect and hinder the trenching work.

[0022] In an optional embodiment, it further includes a second reinforcing plate arranged parallel to the base plate, wherein the second reinforcing plate is arranged between the first reinforcing plate and the mounting plate, and is fixedly connected to the first reinforcing plate and the mounting plate.

[0023] Beneficial effect: By providing a second reinforcing plate parallel to the base plate, the structural strength of the mounting frame along the length direction of the base plate is further improved, the mounting frame's ability to resist impact force is improved, and the structure is made more stable and reliable.

[0024] In the second aspect, the utility model also provides a troughing machine, comprising: an excavator arm, provided with a fixed seat; a grab bucket, the grab bucket is rotatably connected to the fixed seat; the above-mentioned mud scraping structure is arranged on the inner side of the grab bucket, and the mounting frame is fixedly connected to the fixed seat.

[0025] Beneficial effect: By arranging the above-mentioned scraping structure on the grab bucket, and meeting the demand for scraping function in the grab bucket through the mounting frame and the scraping assembly, when the grab bucket falls, the impact teeth replace the bucket teeth, scraping plates or mounting frames of the grab bucket and first come into contact with the soil layer, which can not only crush and decompose the hard soil layer or stones for grabbing by the grab bucket, but also avoid the scraping plates or mounting frames and other structures being damaged by direct impact, so that the excavation structure can adapt to different construction environments such as hard soil layers and soft soil layers, making the trenching machine less dependent on other auxiliary equipment and instruments, and the construction range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a mud scraping structure according to an embodiment of the utility model at a viewing angle;

[0028] Figure 2A schematic structural diagram of a mud scraping structure according to an embodiment of the utility model at another viewing angle;

[0029] Figure 3 This is a schematic diagram of the structure of an impact tooth in a mud scraping structure according to an embodiment of the utility model;

[0030] Figure 4 It is an exploded structural diagram of an impact tooth in a mud scraping structure according to an embodiment of the utility model;

[0031] Figure 5 It is a schematic cross-sectional structure diagram of the cooperation between a grab bucket and a mud scraping structure in a troughing machine according to an embodiment of the utility model.

[0032] Description of reference numerals:

[0033] 100, mounting frame; 101, base plate; 102, first reinforcing plate; 103, mounting plate; 104, second reinforcing plate; 200, scraper assembly; 201, scraper plate; 202, mounting seat; 2021, seat body; 2022, connecting plate; 300, impact tooth; 301, tooth sleeve; 3011, mounting groove; 3012, clamping part; 302, tooth seat; 3021, clamping groove; 400, grab bucket; 500, fixing seat; 600, limit stop. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] In the related art, since the trenching machine usually only grabs the soil layer through the grab bucket and does not have the ability to actively excavate, when the soil layer is hard and there are many stones, the hard soil layer and stones will interfere with the scraper board and other structures inside the grab bucket, blocking the descent of the grab bucket, and easily damaging the scraper board and other structures, thereby seriously affecting the excavation progress. In this case, a double-wheel trenching machine is usually used for trenching. However, the double-wheel trenching machine has a slow excavation speed, expensive equipment, high maintenance cost and is not suitable for soft clay layers.

[0036] The present application provides a mud scraping structure and a troughing machine. By improving the mud scraping structure in the grab bucket, the grab bucket has the ability to crush hard soil layers and stones, thereby enabling the troughing machine to adapt to hard soil layers and soil layers with stones, and to a certain extent can replace the function of the double-wheel milling machine. The mud scraping structure is structurally reinforced to avoid damage to the mud scraping structure, thereby improving efficiency and saving costs.

[0037] For the convenience of description, the following Figure 1 In the illustrated orientation, “up” refers to the upper side, and “down” refers to the lower side.

[0038] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0039] According to an embodiment of the utility model, on the one hand, a mud scraping structure is provided, which is used to be installed on the inner side of the grab bucket 400, including: a mounting frame 100; a mud scraping assembly 200, which is arranged on opposite sides of the mounting frame 100 and is suitable for being arranged opposite to the inner wall of the grab bucket 400; an impact tooth 300, which is arranged at the bottom of the mounting frame 100 and has a shielded state and an exposed state. In the shielded state, the impact tooth 300 is located in the internal space of the grab bucket 400, and in the exposed state, the grab bucket 400 is opened so that the tooth tip of the impact tooth 300 protrudes out of the grab bucket 400.

[0040] In this embodiment, the mounting frame 100 is provided to provide a structural foundation for the installation of other structures. The impact teeth 300 are arranged on the mounting frame 100, and the scraper assembly 200 is used to reduce the adhesion of soil materials to the inner wall of the grab bucket 400. During the falling process of the grab bucket 400, the grab bucket 400 is opened, and the impact teeth 300 first contact the soil layer to be excavated. The impact teeth 300 break and disintegrate the hard soil layer or stone, thereby facilitating the grab bucket 400 to smoothly grab the soil layer, so that the grab bucket 400 can not only work in a soft soil layer environment, but also can excavate hard soil layers or soil layers with stones. In addition, since the impact teeth 300 replace the bucket teeth, mounting frame 100 and scraper blade 201 of the grab bucket 400 to first contact the hard soil layer or stone, the possibility of the bucket teeth and scraper blade 201 of the grab bucket 400 being worn, damaged or broken by impact is greatly reduced, making the structure more reliable.

[0041] Specifically, two mounting frames 100 are provided, and are respectively located inside two grab buckets 400. The mounting frame 100 can be connected to the fixing seat 500 of the excavator arm by welding, or can be installed on the fixing seat 500 of the excavator arm by fasteners. The present embodiment does not limit the specific shape and structure of the mounting frame 100, and it can be used as a structural basis for the installation of the scraper assembly 200 and the impact tooth 300. Two groups of scraper assemblies 200 are provided on each mounting frame 100 and are arranged on the mounting frame 100 oppositely. The scraper assemblies 200 are respectively facing the corresponding side walls of the grab bucket 400, so that the scraper assemblies 200 abut against the side walls of the grab bucket 400, or there is a small gap between the scraper assemblies 200 and the grab bucket 400, so that the mud adhering to the grab bucket 400 is separated from the side walls of the grab bucket 400 when the grab bucket 400 is opened.

[0042] In addition, specifically, the fingertips of the impact teeth 300 away from the mounting frame 100 are pyramid-shaped, and the tip thereof faces the opening direction of the grab bucket 400 .

[0043] It should be noted that, in this embodiment, since a counterweight is usually provided at the excavator arm of the trenching machine to ensure the vertical movement of the excavator arm and to have sufficient weight in the vertical direction to press down the grab 400, after the impact tooth 300 is installed on the mounting frame 100, as the excavator arm falls, the impact tooth 300 collides with the hard soil layer or stone, and continues to squeeze the soil layer or stone under the action of the counterweight, the contact area between the tooth tip of the impact tooth 300 and the soil layer or stone is small, so the pressure is relatively large, and the soil layer or stone is easily broken and decomposed.

[0044] In one embodiment, the impact tooth 300 includes a tooth seat 302 and a tooth sleeve 301 . The tooth seat 302 is fixed on the mounting frame 100 , and the tooth sleeve 301 is detachably connected to the tooth seat 302 .

[0045] Specifically, the tooth seat 302 can be fixed on the mounting frame 100 by welding. The tooth sleeve 301 and the tooth seat 302 can be detachably connected by the cooperation of the plug block and the slot. In some embodiments not shown, the impact tooth 300 and the tooth seat 302 can also be detachably connected by auxiliary fasteners such as bolts, screws, and connecting ears.

[0046] In this embodiment, the tooth sleeve 301 and the tooth seat 302 are detachably connected, so that when the tooth sleeve 301 is damaged or broken after long-term use, the tooth sleeve 301 can be replaced to put the structure back into operation without replacing the entire scraper assembly 200, thereby saving the economic and time costs of maintenance. At the same time, since the impact tooth 300 is light in weight and small in size compared to the entire scraper structure, it is more convenient for maintenance personnel to operate.

[0047] In one embodiment, the gear sleeve 301 is provided with a mounting groove 3011 , the gear seat 302 extends into the mounting groove 3011 , the inner side wall of the gear sleeve 301 is provided with an inwardly protruding clamping portion 3012 , and a clamping groove 3021 is provided on the gear seat 302 at a position matching the clamping portion 3012 .

[0048] In this embodiment, the tooth seat 302 is inserted into the tooth sleeve 301 by setting the installation groove 3011, and the tooth seat 302 and the tooth sleeve 301 are positioned by the cooperation of the clamping portion 3012 on the tooth sleeve 301 and the clamping groove 3021 on the tooth seat 302, thereby realizing the detachable connection between the tooth sleeve 301 and the tooth seat 302. When installing the tooth sleeve 301, the tooth sleeve 301 without the clamping portion 3012 is first installed on the tooth seat 302, and then the position on the tooth sleeve 301 corresponding to the clamping groove 3021 is squeezed or hammered by a device such as a hydraulic pliers, so that the inner side wall of the tooth sleeve 301 bulges toward the inner side of the installation groove 3011 to form the clamping portion 3012, thereby realizing the clamping fit.

[0049] In one embodiment, the gear seat 302 and the gear sleeve 301 are respectively provided with limit stops 600 protruding toward each other at the notches of the installation slot 3011 .

[0050] Specifically, the relatively arranged limit stops 600 are arranged in a staggered manner.

[0051] In this embodiment, two limit stops 600 are provided to limit the relative position of the gear seat 302 and the gear sleeve 301. At the same time, when the gear sleeve 301 needs to be removed from the gear seat 302, the tooth tip part of the gear sleeve 301 is hammered, and the hammering direction is from the limit stop 600 direction of the gear sleeve 301 toward the limit stop 600 direction of the gear seat 302, so that the gear sleeve 301 forms a lever structure with the limit stop 600 of the gear seat 302 and the gear sleeve 301 as the fulcrum. During the hammering process, the lever structure amplifies the hammering force, thereby making it easy to separate the gear sleeve 301 from the gear seat 302.

[0052] In one embodiment, the relatively arranged limit stops 600 are both semi-enclosed around the circumference of the gear seat 302 and the gear sleeve 301 , and the relatively arranged limit stops 600 are interlocked with each other.

[0053] In this embodiment, by providing mutually interlocking limit stops 600, and making the limit stops 600 semi-enclosed in the circumference of the gear seat 302, when the gear sleeve 301 is disassembled by hammering, the other two limit stops 600 are interlocked at two abutting positions to form a fulcrum of the lever structure and generate torque, thereby making the direction of deflection and disengagement of the gear sleeve 301 more stable, avoiding damage to the gear seat 302 during the disassembly process.

[0054] In one embodiment, the scraper assembly 200 includes a mounting seat 202 and a scraper blade 201. The scraper blade 201 is fixed on the mounting seat 202. The mounting seat 202 includes a seat body 2021 and a connecting plate 2022. The connecting plate 2022 is fixed on the seat body 2021. The scraper blade 201 is fixed on a side of the connecting plate 2022 away from the seat body 2021. The seat body 2021 is detachably connected to the mounting frame 100 via fasteners.

[0055] Specifically, this embodiment does not limit the specific form of the fastener, and the fastener may include screws and bolts, and may also include other forms of components with connection and fastening functions.

[0056] In this embodiment, the scraper blade 201 is connected to the mounting frame 100 through the mounting seat 202. The scraper blade 201 is located inside the grab bucket 400. When the grab bucket 400 of the excavator arm grabs the mud, the grab bucket 400 opens in the process of releasing the mud. At this time, the inner wall of the grab bucket 400 and the scraper blade 201 move relative to each other, so that the mud adhering to the inner side of the grab bucket 400 is separated from the grab bucket 400. Since the mounting seat 202 includes a seat body 2021 and a connecting plate 2022 provided on the seat body 2021, the connecting plate 2022 can adjust the position of the scraper blade 201 so that the scraper blade 201 is close to the inner wall of the grab bucket 400. In addition, since the seat body 2021 is detachably connected to the mounting frame 100, the same scraper structure can be adapted to grab buckets 400 of different sizes and models by replacing the mounting seat 202 with different lengths of the connecting plate 2022, thereby improving the applicable scope of the structure.

[0057] In one embodiment, the mounting frame 100 includes a pair of substrates 101 arranged opposite to each other and a first reinforcing plate 102 and a mounting plate 103 arranged between the pair of substrates 101, the substrate 101 is fixedly connected to the fixing seat 500 of the excavator arm, the first reinforcing plate 102 is respectively fixedly connected to each substrate 101, the mounting plate 103 is respectively fixedly connected to each substrate 101, and the impact tooth 300 is arranged on the mounting plate 103.

[0058] Specifically, the plate surfaces of the base plate 101 , the first reinforcing plate 102 and the mounting plate 103 are all arranged parallel to the direction of the opening of the grab bucket 400 , thereby reducing the resistance when the grab bucket 400 enters the soil layer.

[0059] It should be noted that the present embodiment does not limit the number of the first reinforcing plates 102 , and the number of the first reinforcing plates 102 may be two. In some embodiments not shown, the number of the first reinforcing plates 102 may also be one, three or more.

[0060] It should be further explained that the first reinforcing plate 102 , the base plate 101 , and the mounting plate 103 may be connected by welding or by fasteners such as bolts and screws.

[0061] In this embodiment, the main body of the mounting frame 100 is formed by at least two substrates 101, and then the two or more substrates 101 are connected by a first reinforcing plate 102, so that each substrate 101 forms a whole and improves the overall structural strength, making the mounting frame 100 structure more stable. By setting the mounting plate 103, while further improving the overall structural strength of the mounting frame 100, it also provides an installation foundation for the impact tooth 300.

[0062] In one embodiment, there are a plurality of impact teeth 300 , and the plurality of impact teeth 300 are spaced apart and distributed along the width direction of the mounting frame 100 .

[0063] In this embodiment, by arranging a plurality of impact teeth 300 at intervals on the mounting plate 103, the impact of the impact teeth 300 on the soil layer is made more uniform, and the reaction force of the soil layer on the impact teeth 300 during the impact of the soil layer is prevented from causing the excavator arm to deflect and hindering the trenching work.

[0064] In one embodiment, a second reinforcing plate 104 is further included, which is arranged parallel to the base plate 101 . The second reinforcing plate 104 is arranged between the first reinforcing plate 102 and the mounting plate 103 , and is fixedly connected to the first reinforcing plate 102 and the mounting plate 103 .

[0065] Specifically, when there are two or more first reinforcing plates 102, the second reinforcing plates 104 may be disposed between the mounting plate 103 and the adjacent first reinforcing plates 102. In some embodiments not shown, the second reinforcing plates 104 may also penetrate through each of the second reinforcing plates 104 and be fixedly connected to each of the second reinforcing plates 104. The fixed connection may be by welding or by fasteners such as bolts and screws.

[0066] In this embodiment, by providing a second reinforcing plate 104 parallel to the base plate 101, the structural strength of the mounting frame 100 along the length direction of the base plate 101 is further improved, and the ability of the mounting frame 100 to resist impact force is improved, making the structure more stable and reliable.

[0067] According to an embodiment of the utility model, on the other hand, a troughing machine is also provided, the excavator arm is provided with a fixed seat 500; the grab 400 is rotatably connected to the fixed seat 500; the above-mentioned mud scraping structure is arranged on the inner side of the grab 400, and the mounting frame 100 is fixedly connected to the fixed seat 500.

[0068] In this embodiment, the scraping structure is provided on the grab 400, and the demand for the scraping function in the grab 400 is met by the mounting frame 100 and the scraping assembly 200. When the grab 400 falls, the impact teeth 300 replace the scraping plates 201 or the mounting frame 100 and other structures to first come into contact with the soil layer, which can not only crush and decompose the hard soil layer or stones for grabbing by the grab 400, but also avoid the situation where the grab teeth, scraping plates 201 or the mounting frame 100 and other structures are directly impacted and damaged, so that the excavation structure can adapt to different construction environments such as hard soil layers and soft soil layers, so that the trenching machine is less dependent on other auxiliary equipment and instruments, and the construction range is wider.

[0069] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A mud scraping structure, used to be installed inside a grab bucket (400), characterized in that: include: Mounting frame (100); A mud scraping assembly (200) is disposed on opposite sides of the mounting frame (100) and is adapted to be disposed opposite to the inner side wall of the grab bucket (400); The impact tooth (300) is arranged at the bottom of the mounting frame (100) and has a shielded state and an exposed state. In the shielded state, the impact tooth (300) is located in the internal space of the grab bucket (400). In the exposed state, the grab bucket (400) is opened so that the tooth tip of the impact tooth (300) protrudes from the grab bucket (400).

2. The mud scraping structure according to claim 1, characterized in that: The impact tooth (300) comprises a tooth seat (302) and a tooth sleeve (301); the tooth seat (302) is fixed on the mounting frame (100); and the tooth sleeve (301) is detachably connected to the tooth seat (302).

3. The mud scraping structure according to claim 2, characterized in that: The gear sleeve (301) is provided with a mounting groove (3011), the gear seat (302) extends into the mounting groove (3011), the inner side wall of the gear sleeve (301) is provided with a clamping portion (3012) protruding inwardly, and a clamping groove (3021) is provided at a position where the gear seat (302) matches the clamping portion (3012).

4. The mud scraping structure according to claim 3, characterized in that: The tooth seat (302) and the tooth sleeve (301) are respectively provided with limit stops (600) protruding toward each other at the notches of the installation slot (3011).

5. The mud scraping structure according to claim 4, characterized in that: The relatively arranged limit stops (600) are both in a semi-enclosed shape and surround the circumference of the gear seat (302) and the gear sleeve (301), and the relatively arranged limit stops (600) are interlocked with each other.

6. The mud scraping structure according to any one of claims 1 to 5, characterized in that: The mud scraping assembly (200) comprises a mud scraping plate (201) and a mounting seat (202); the mud scraping plate (201) is fixedly mounted on the mounting seat (202); and the mounting seat (202) is detachably connected to the mounting frame (100) via a fastener.

7. The mud scraping structure according to claim 6, characterized in that: The mounting frame (100) comprises a pair of base plates (101) arranged opposite to each other, and a first reinforcing plate (102) and a mounting plate (103) arranged between the pair of base plates (101); the base plates (101) are fixedly connected to a fixing seat (500) of an excavator arm, and the impact teeth (300) are arranged at the bottom of the mounting plate (103).

8. The mud scraping structure according to claim 7, characterized in that: There are a plurality of the impact teeth (300), and the plurality of impact teeth (300) are distributed at intervals along the width direction of the mounting frame (100).

9. The mud scraping structure according to claim 7, characterized in that: It also includes a second reinforcing plate (104) arranged parallel to the base plate (101), wherein the second reinforcing plate (104) is arranged between the first reinforcing plate (102) and the mounting plate (103), and is fixedly connected to the first reinforcing plate (102) and the mounting plate (103).

10. A slotting machine, characterized in that: include: An excavator arm is provided with a fixing seat (500); A grab bucket (400), the grab bucket (400) being rotatably connected to the fixing seat (500); The mud scraping structure according to any one of claims 1 to 9 is arranged on the inner side of the grab bucket (400), and the mounting frame (100) is fixedly connected to the fixing seat (500).

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