One-time forming excavator bucket special for framework slope protection groove excavation
By designing a disposable molded excavator bucket for skeleton slope protection construction, the rapid fixation of the bucket body and bucket is achieved by using the expanded connection components, the problems of excavation time and serious core soil damage in existing construction are solved. , improve construction efficiency and standardization.
Patent Information
- Application Number
- CN202411698561.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-02-21
AI Technical Summary
During the existing skeleton slope protection construction, excavation takes a long time, the core soil damage range is large, the repeated repair and later backfill project volume is large, and the excavator operation range is large, which will seriously damage the core soil, reduce construction standardization, which is not conducive to water recirculation. Protect.
Provide a disposable molding excavator bucket for skeleton slope protection excavation trench, including bucket body, tooth sleeve, connection hole and expansion connection assembly. The expansion connection assembly enables convenient fixation of bucket body and bucket, reducing Disassembly and set time.
It realizes rapid fixing and convenient disassembly of the bucket, reduces construction time, reduces damage to core soil, and improves construction standardization and environmental protection effects.
Smart Images
Figure CN119491524A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of skeleton slope protection; in particular, the invention relates to a disposable excavator bucket specially used for excavating trenches in skeleton slope protection. Background Art
[0002] During the construction of skeleton slope protection, excavation takes a long time, the core soil is damaged to a large extent, and repeated repairs are required, and even a large amount of concrete is needed to fill and adjust the line shape. The amount of backfill work in the later stage is large, mainly in soil areas, the soil is prone to collapse, the excavation line is not straight, the excavation section is uneven, and a lot of time is required for manual repair. In addition, during the excavation process, the excavator needs to operate within a large range, which causes serious damage to the core soil, reduces construction standardization, is not conducive to environmental water protection, and has a great negative impact on the company's construction image.
[0003] When excavating the main skeleton of the existing skeleton slope protection, it is necessary to remove the pins on the bucket teeth of the original excavator bucket, put the small bucket teeth on the bucket through the welded sleeve, and reinstall the pins in the mounting holes to fix them. This method requires the use of other tools to assist in disassembly and fixation, such as using a hammer to hammer the pin shaft into or out of the mounting hole on the bucket teeth of the bucket, which is not convenient to use. Summary of the invention
[0004] In view of this, the present invention provides a disposable excavator bucket specially used for excavating trenches in skeleton slope protection, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.
[0005] In order to achieve the above-mentioned object, the present invention provides a disposable excavator bucket specially used for excavating trenches on a skeleton slope protection, comprising a bucket body, a tooth sleeve, a connecting hole and an expansion connection assembly, wherein the tooth sleeve is fixedly mounted on the bucket and used to sleeve the bucket teeth of the bucket, the connecting holes are arranged on both sides of the tooth sleeve, and the inner diameter of the connecting hole is larger than the inner diameter of the mounting hole on the bucket teeth;
[0006] The expansion connection assembly includes a pin rod, a first-end expansion body, a second-end expansion body and two middle expansion bodies. The pin rod includes a first end and a second end. The first-end expansion body and the second-end expansion body are respectively arranged at the first end and the second end of the pin rod, and are used to press against the hole walls of the connecting holes after expanding in the two connecting holes respectively. Two middle expansion bodies are arranged on the pin rod between the first-end expansion body and the second-end expansion body, and are used to press against the mounting holes after expanding in the mounting holes.
[0007] In a disposable molded excavator bucket specially used for excavating trenches for skeleton slope protection as described above, optionally, the first-end expansion body includes a first-end cone sleeve and a first-end expansion block, the first-end cone sleeve is fixedly mounted on the first end of the pin rod, and the first-end expansion block is slidably arranged on the outside of the first-end cone sleeve, and when the first-end cone sleeve is displaced toward the second end of the pin rod relative to the first-end expansion block, the first-end expansion block is driven to displace radially away from the center of the first-end cone sleeve.
[0008] In a disposable molded excavator bucket specially used for excavating trenches for skeleton slope protection as described above, optionally, a first end slide groove is opened on the first end cone sleeve, and a first end slider is fixedly provided on a side of the first end expansion block facing the center of the first end cone sleeve, and the first end slider is slidably matched with the first end slide groove.
[0009] In a disposable formed excavator bucket specially used for excavating trenches for skeleton slope protection as described above, optionally, the second-end expansion body includes a second-end cone sleeve and a second-end expansion block, the second-end expansion block sliding sleeve is arranged on the second end of the pin rod, and the second-end expansion block is slidingly arranged on the outside of the first-section cone sleeve, and when the second-end cone sleeve moves toward the first end of the pin rod relative to the second-end expansion block, the second-end expansion block is driven to move radially away from the center of the second-end cone sleeve.
[0010] In a disposable molded excavator bucket specially used for excavating trenches for skeleton slope protection as described above, optionally, a second end slide groove is provided on the second end cone sleeve, and a second end slider is fixedly provided on a side of the second end expansion block facing the center of the second end cone sleeve, and the second end slider is slidably matched with the second end slide groove.
[0011] In a disposable formed excavator bucket specially used for trench excavation in a skeleton slope protection as described above, optionally, the middle expansion body includes a sleeve, a center hole, an outer plane and an inner inclined surface, the center hole is opened in the center of the sleeve, the sleeve is mounted on the pin rod through the center hole, the inner diameter of the center hole is larger than the outer diameter of the pin rod, the side faces of the two sleeves facing away from each other are outer planes, and the side faces of the two sleeves facing each other are inner inclined surfaces that match each other.
[0012] In a disposable molded excavator bucket specially used for excavating trenches for skeleton slope protection as described above, optionally, the first end expansion block and the second end expansion block include an outer arc surface, a conical surface and an inner arc surface in sequence from the outside to the inside on one side facing the pin rod, and the first end cone sleeve and the second end cone sleeve include a cylindrical body and a conical body from the outside to the inside, the inner diameters of the outer arc surface and the inner arc surface are both adapted to the outer diameter of the cylindrical body, the outer diameter of the smaller end of the cone body is smaller than the inner diameter of the mounting hole, and the inner end of the cone body causes the middle expansion body to expand by squeezing the sleeve inward.
[0013] In the disposable excavator bucket specially used for trench excavation of skeleton slope protection as described above, optionally, limit blocks are fixedly provided on the circumferential surfaces of the first end cone sleeve and the second end cone sleeve, and a limit groove for inserting the limit block is provided on the connecting hole.
[0014] In the disposable excavator bucket specially used for trench excavation in skeleton slope protection as described above, optionally, the pin rod is provided with a threaded section at one end of the second end cone sleeve, and a tightening nut is provided on the threaded sleeve of the threaded section.
[0015] The present invention provides a disposable formed excavator bucket specially used for excavating trenches for skeleton slope protection. Before expansion, the outer diameters of the first end expansion body and the second end expansion body are smaller than the inner diameter of the connecting hole, and the outer diameter of the middle expansion body is smaller than the inner diameter of the mounting hole, so that it can be easily inserted into the connecting hole and the mounting hole. And it only needs to rotate the tightening nut to make the first end expansion body and the second end expansion body expand and press against the inner wall of the connecting hole first, and then expand the middle expansion body and press against the inner wall of the mounting hole, so that the bucket body and the bucket are fixed, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The disclosure of the present invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:
[0017] Figure 1 It is a schematic diagram of the connection between the disposable excavator bucket specially used for trench excavation of the skeleton slope protection of the present invention and the excavator bucket.
[0018] Figure 2 for Figure 1 sectional view of .
[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle.
[0020] Figure 4 for Figure 2 Enlarged view of point B in the middle.
[0021] Figure 5 for Figure 2 sectional view of .
[0022] Figure 6 for Figure 5 Enlarged view of point C in the figure.
[0023] Figure 7 It is a schematic diagram of the connection between the pin rod, the first end expansion body and the middle expansion body.
[0024] Figure 8 It is a schematic structural diagram of the second end expansion body.
[0025] Fig. 9 It is a structural schematic diagram of the second end slider.
[0026] Fig.10 This is a schematic diagram of the structure of the middle expansion body.
[0027] Figure markings: 1-bucket body; 2-tooth sleeve; 3-connecting hole; 4-pin rod; 5-first end expansion body; 5.1-first end cone sleeve; 5.2-first end expansion block; 5.3-first end slide groove; 5.4-first end slider; 6-second end expansion body; 6.1-second end cone sleeve; 6.2-second end expansion block; 6.3-second end slide groove; 6.4-second end slider; 7-middle expansion body; 7.1-sleeve; 7.2-center hole; 7.3-outer plane; 7.4-inner inclined surface; 8-outer arc surface; 9-conical surface; 10-inner arc surface; 11-cylindrical body; 12-conical body; 13-limiting block; 14-limiting groove; 15-threaded section; 16-tightening nut. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] like Figures 1 to 5 As shown, a typical embodiment of the present invention provides a disposable excavator bucket for excavating trenches for skeleton slope protection, comprising a bucket body 1, a tooth sleeve 2, a connecting hole 3 and an expansion connection assembly, wherein the tooth sleeve 2 is fixedly mounted on the bucket and used to sleeve the bucket teeth of the bucket, and the connecting holes 3 are provided on both sides of the tooth sleeve 2, and the inner diameter of the connecting hole 3 is larger than the inner diameter of the mounting hole on the bucket teeth;
[0030] The expansion connection assembly includes a pin rod 4, a first-end expansion body 5, a second-end expansion body 6 and two middle expansion bodies 7. The pin rod 4 includes a first end and a second end. The first-end expansion body 5 and the second-end expansion body 6 are respectively arranged at the first end and the second end of the pin rod 4, and are used to press against the hole walls of the connecting holes 3 after expanding in the two connecting holes 3 respectively. The two middle expansion bodies are arranged on the pin rod 4 between the first-end expansion body 5 and the second-end expansion body 6, and are used to press against the mounting holes after expanding in the mounting holes.
[0031] First, before use, the tooth sleeve 2 is sleeved on the bucket tooth so that the connecting hole 3 and the mounting hole on the bucket tooth correspond to each other, and the pin rod 4 is inserted into the connecting hole 3 so that the middle expansion body 7 is inserted into the mounting hole on the bucket tooth, the first end expansion body 5 is inserted into the connecting hole 3 on one side, and the second end expansion body 6 is inserted into the connecting hole 3 on the other side. After the insertion is completed, the first end expansion body 5 and the second end expansion body 6 are expanded. After the expansion is completed, they are used to press against the hole wall of the connecting hole 3. The first end expansion body 5 and the second end expansion body 6 are close to each other, and the middle expansion body 7 is expanded. After the expansion is completed, it is used to press against the inner wall of the mounting hole on the bucket tooth, so that the center of the connecting hole 3, the mounting hole of the bucket tooth and the pin rod 4 are on the same line, so as to achieve the effect of fixing the bucket body 1 on the bucket tooth.
[0032] like Figure 6 and Figure 7 As shown, the first-end expansion body 5 includes a first-end cone sleeve 5.1 and a first-end expansion block 5.2. The first-end cone sleeve 5.1 is fixedly sleeved on the first end of the pin rod 4, and the first-end expansion block 5.2 is slidably arranged on the outside of the first-end cone sleeve 5.1. When the first-end cone sleeve 5.1 moves toward the second end of the pin rod 4 relative to the first-end expansion block 5.2, the first-end expansion block 5.2 is driven to move radially away from the center of the first-end cone sleeve 5.1.
[0033] When the first-end expansion body 5 is not expanded, the outer diameter of the first-end expansion block 5.2 is smaller than the inner diameter of the connecting hole 3 and larger than the inner diameter of the mounting hole of the bucket tooth. When the first-end expansion body 5 moves toward the mounting hole on the bucket tooth, the first-end expansion block 5.2 is blocked by the bucket tooth, and the first-end cone sleeve 5.1 continues to move. The first-end expansion body 5 will move radially away from the center of the first-end cone sleeve 5.1 and press against the inner wall of the connecting hole 3 on one side.
[0034] like Figure 7 As shown, a first end slide groove 5.3 is provided on the first end cone sleeve 5.1, and a first end slider 5.4 is fixedly provided on a side of the first end expansion block 5.2 facing the center of the first end cone sleeve 5.1, and the first end slider 5.4 is slidably matched with the first end slide groove 5.3.
[0035] The first-end slide groove 5.3 is set to be L-shaped, and the first-end slider 5.4 slides inside the first-end slide groove 5.3. When the first-end slider 5.4 slides in the inclined area, the first-end expansion body 5 will be radially displaced away from the center of the first-end cone sleeve 5.1. When the first-end slider 5.4 slides in the horizontal area, the first-end expansion body 5 will maintain a state of abutting the inner wall of the connecting hole 3, and the first-end cone sleeve 5.1 continues to move toward the inside of the mounting hole of the bucket tooth and is inserted into the inside of the mounting hole.
[0036] like Figure 8As shown, the second-end expansion body 6 includes a second-end cone sleeve 6.1 and a second-end expansion block 6.2. The second-end expansion block 6.2 is slidingly sleeved on the second end of the pin rod 4. The second-end expansion block 6.2 is slidingly set on the outside of the first-section cone sleeve. When the second-end cone sleeve 6.1 moves toward the first end of the pin rod 4 relative to the second-end expansion block 6.2, the second-end expansion block 6.2 is driven to move radially away from the center of the second-end cone sleeve 6.1.
[0037] When the second-end expansion body 6 is not expanded, the outer diameter of the second-end expansion block 6.2 is smaller than the inner diameter of the connecting hole 3 and larger than the inner diameter of the mounting hole of the bucket tooth. When the second-end expansion body 6 moves toward the mounting hole on the bucket tooth, the second-end expansion block 6.2 is blocked by the bucket tooth, and the second-end cone sleeve 6.1 continues to move. The second-end expansion body 6 will move radially away from the center of the second-end cone sleeve 6.1 and press against the inner wall of the connecting hole 3 on the other side.
[0038] like Figure 8 As shown, a second end slide groove 6.3 is provided on the second end cone sleeve 6.1, and a second end slider 6.4 is fixedly provided on a side of the second end expansion block 6.2 facing the center of the second end cone sleeve 6.1, and the second end slider 6.4 is slidably matched with the second end slide groove 6.3.
[0039] The second end slide groove 6.3 is set to be L-shaped, and the second end slider 6.4 slides inside the second end slide groove 6.3. When the second end slider 6.4 slides in the inclined area, the second end expansion body 6 will move radially away from the center of the second end cone sleeve 6.1. When the second end slider 6.4 slides in the horizontal area, the second end expansion body 6 will maintain a state of abutting the inner wall of the connecting hole 3, and the second end cone sleeve 6.1 continues to move toward the inside of the mounting hole of the bucket tooth and is inserted into the inside of the mounting hole.
[0040] like Figure 7 and Fig.10 As shown, the middle expansion body 7 includes a sleeve 7.1, a center hole 7.2, an outer plane 7.3 and an inner inclined surface 7.4. The center hole 7.2 is opened at the center of the sleeve 7.1. The sleeve 7.1 is sleeved on the pin 4 through the center hole 7.2. The inner diameter of the center hole 7.2 is larger than the outer diameter of the pin 4. The side faces of the two sleeves 7.1 facing away from each other are the outer plane 7.3, and the side faces of the two sleeves 7.1 facing each other are the inner inclined surfaces 7.4 that match each other.
[0041] When the first end cone sleeve 5.1 and the second end cone sleeve 6.1 are both inserted into the mounting hole, the opposite sides of the first end cone sleeve 5.1 and the second end cone sleeve respectively contact the outer plane 7.3 of the two sleeves 7.1. When the first end cone sleeve 5.1 and the second end cone sleeve 6.1 drive the sleeve 7.1 to move, the two sleeves 7.1 will move radially along the inner inclined surface 7.4 away from the center of the pin rod 4 and press against the inner wall of the mounting hole of the excavator bucket tooth.
[0042] like Fig. 9 As shown, the side surfaces of the first end expansion block 5.2 and the second end expansion block 6.2 facing the pin rod 4 include an outer arc surface 8, a conical surface 9 and an inner arc surface 10 from the outside to the inside, and the first end cone sleeve 5.1 and the second end cone sleeve 6.1 include a cylindrical body 11 and a conical body 12 from the outside to the inside. The inner diameters of the outer arc surface 8 and the inner arc surface 10 are both adapted to the outer diameter of the cylindrical body 11, the outer diameter of the smaller end of the cone body 12 is smaller than the inner diameter of the mounting hole, and the inner end of the cone body 12 causes the middle expansion body 7 to expand by squeezing the sleeve 7.1 inward.
[0043] When the first-end expansion body 5 and the second-end expansion body 6 are in an unexpanded state, the outer arc surface 8 contacts the cylindrical body 11, and the conical surface 9 contacts the conical body 12. At this time, they can be inserted into the connecting hole 3. During the displacement process, the first-end expansion block 5.2 and the second-end expansion block 6.2 are driven to move toward the bucket tooth mounting hole, so that the opposing surfaces of the first-end expansion block 5.2 and the second-end expansion block 6.2 contact the outer wall of the bucket tooth. When the first-end cone sleeve 5.1 and the second-end cone sleeve 6.1 continue to displace, the conical surface 9 moves radially away from the center of the pin rod 4 along the cone body 12 and presses against the inner wall of the connecting hole 3. When the first-end cone sleeve 5.1 and the second-end cone sleeve 6.1 continue to displace, the inner arc surface 10 contacts the cylindrical body 11, so that the first-end cone sleeve 5.1 and the second-end cone sleeve 6.1 can be inserted into the mounting hole of the bucket tooth.
[0044] like Figure 6 As shown, limiting blocks 13 are fixedly provided on the circumferential surfaces of the first end cone sleeve 5.1 and the second end cone sleeve 6.1, and limiting grooves 14 for inserting the limiting blocks 13 are provided on the connecting hole 3.
[0045] When inserting the pin rod 4, the limit block 13 on the first end cone sleeve 5.1 is inserted into the limit groove 14 of the connecting hole 3, so that the pin rod 4 is limited as a whole to prevent the pin rod 4 from rotating. When inserting the second end expansion body 6, the limit block 13 on the second end cone sleeve 6.1 is inserted into the limit groove 14 of the connecting hole 3 on the other side to prevent the second end expansion body 6 from rotating.
[0046] like Figure 6 and Figure 7 As shown, a threaded section 15 is provided at one end of the pin rod 4 located at the second end cone sleeve 6.1, and a tightening nut 16 is threadedly sleeved on the threaded section 15.
[0047] When the first-end expansion body 5, the second-end expansion body 6 and the middle expansion body 7 are all inserted into the specified positions, the tightening nut 16 is threadedly connected to the threaded section 15 of the pin rod 4. Since the pin rod 4 and the second-end expansion body 6 are both limited by the limit block 13 and the limit groove 14, when the tightening nut 16 is rotated, the first-end expansion body 5 will be driven to move one end toward the second-end expansion body 6. When the tightening nut 16 contacts the second-end expansion body 6, it drives the second-end expansion body 6 to move toward the first-end expansion body 5, so that the first-end expansion body 5 and the second-end expansion body 6 can expand. When the first-end cone sleeve 5.1 and the second-end cone sleeve 6.1 are both inserted into the mounting hole, they contact the outer plane 7.3 of the middle expansion body 7 to expand the middle expansion body 7. When the first-end expansion body 5, the second-end expansion body 6 and the middle expansion body 7 are all expanded, the center of the mounting hole and the connecting hole 3 are on the same line, so as to achieve the function of fixing the bucket body 1 and the bucket.
[0048] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above implementation without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the scope of the present invention.
Claims
1. A disposable excavator bucket specially used for trench excavation of skeleton slope protection, characterized in that: It comprises a bucket body (1), a tooth sleeve (2), a connection hole (3) and an expansion connection assembly, wherein the tooth sleeve (2) is fixedly mounted on the bucket and is used to sleeve the bucket teeth of the bucket, and the connection hole (3) is provided on both sides of the tooth sleeve (2), and the inner diameter of the connection hole (3) is larger than the inner diameter of the mounting hole on the bucket teeth; The expansion connection assembly comprises a pin rod (4), a first end expansion body (5), a second end expansion body (6) and two middle expansion bodies (7); the pin rod (4) comprises a first end and a second end; the first end expansion body (5) and the second end expansion body (6) are respectively arranged at the first end and the second end of the pin rod (4) and are used to press against the hole walls of the connecting holes (3) after respectively expanding in the two connecting holes (3); the two middle expansion bodies are arranged on the pin rod (4) between the first end expansion body (5) and the second end expansion body (6) and are used to press against the mounting holes after expanding in the mounting holes.
2. A disposable excavator bucket specially used for trench excavation for skeleton slope protection as claimed in claim 1, characterized in that: The first end expansion body (5) comprises a first end cone sleeve (5.1) and a first end expansion block (5.2); the first end cone sleeve (5.1) is fixedly sleeved on the first end of the pin rod (4); the first end expansion block (5.2) is slidably arranged outside the first end cone sleeve (5.1); when the first end cone sleeve (5.1) moves toward the second end of the pin rod (4) relative to the first end expansion block (5.2), the first end expansion block (5.2) is driven to move radially away from the center of the first end cone sleeve (5.1).
3. A disposable excavator bucket specially used for trench excavation for skeleton slope protection as claimed in claim 2, characterized in that: The first end cone sleeve (5.1) is provided with a first end slide groove (5.3), and a first end slider (5.4) is fixedly provided on a side of the first end expansion block (5.2) facing the center of the first end cone sleeve (5.1), and the first end slider (5.4) is slidably matched with the first end slide groove (5.3).
4. A disposable excavator bucket specially used for trench excavation for skeleton slope protection as claimed in claim 2, characterized in that: The second end expansion body (6) comprises a second end cone sleeve (6.1) and a second end expansion block (6.2); the second end expansion block (6.2) is slidably sleeved on the second end of the pin rod (4); the second end expansion block (6.2) is slidably arranged outside the first section cone sleeve; when the second end cone sleeve (6.1) moves relative to the second end expansion block (6.2) toward the first end of the pin rod (4), the second end expansion block (6.2) is driven to move radially in a direction away from the center of the second end cone sleeve (6.1).
5. A disposable excavator bucket specially used for trench excavation for skeleton slope protection as claimed in claim 4, characterized in that: The second end cone sleeve (6.1) is provided with a second end slide groove (6.3), and a second end slider (6.4) is fixedly provided on a side surface of the second end expansion block (6.2) facing the center of the second end cone sleeve (6.1), and the second end slider (6.4) is slidably matched with the second end slide groove (6.3).
6. A disposable excavator bucket specially used for trench excavation for skeleton slope protection as claimed in claim 4, characterized in that: The middle expansion body (7) comprises a sleeve (7.1), a center hole (7.2), an outer plane (7.3) and an inner inclined surface (7.4); the center hole (7.2) is opened at the center of the sleeve (7.1); the sleeve (7.1) is sleeved on the pin rod (4) through the center hole (7.2); the inner diameter of the center hole (7.2) is larger than the outer diameter of the pin rod (4); the side faces of the two sleeves (7.1) facing away from each other are the outer planes (7.3); and the side faces of the two sleeves (7.1) facing each other are the inner inclined surfaces (7.4) that match each other.
7. A disposable excavator bucket specially used for trench excavation for skeleton slope protection as claimed in claim 6, characterized in that: The side surfaces of the first end expansion block (5.2) and the second end expansion block (6.2) facing the pin rod (4) include an outer arc surface (8), a conical surface (9) and an inner arc surface (10) from the outside to the inside, and the first end cone sleeve (5.1) and the second end cone sleeve (6.1) include a cylindrical body (11) and a conical body (12) from the outside to the inside, the inner diameters of the outer arc surface (8) and the inner arc surface (10) are both adapted to the outer diameter of the cylindrical body (11), the outer diameter of the smaller end of the conical body (12) is smaller than the inner diameter of the mounting hole, and the inner end of the conical body (12) causes the middle expansion body (7) to expand by pressing the sleeve (7.1) inward.
8. A disposable excavator bucket specially used for trench excavation for skeleton slope protection as claimed in claim 4, characterized in that: Limit blocks (13) are fixedly arranged on the circumferential surfaces of the first end cone sleeve (5.1) and the second end cone sleeve (6.1), and a limit groove (14) for inserting the limit block (13) is provided on the connecting hole (3).
9. A disposable excavator bucket specially used for trench excavation for skeleton slope protection as claimed in claim 4, characterized in that: A threaded section (15) is provided at one end of the pin rod (4) located on the second end cone sleeve (6.1), and a tightening nut (16) is threadedly sleeved on the threaded section (15).