One-time forming excavator bucket special for framework slope protection groove excavation

Abstract

The utility model belongs to the technical field of framework slope protection, and particularly relates to a one-time forming excavator bucket special for framework slope protection groove excavation, which comprises a bucket body, a gear sleeve, connecting holes and an expansion type connecting component, the gear sleeve is fixedly mounted on the bucket and used for sleeving bucket teeth of the bucket, the connecting holes are arranged on two sides of the gear sleeve, and the expansion type connecting component is fixedly mounted on the bucket body. The inner diameter of the connecting hole is larger than that of the mounting hole in the bucket tooth; the expansion type connecting assembly comprises a pin rod, a first end expansion body, a second end expansion body and two middle expansion bodies, the pin rod comprises a first end and a second end, and the first end expansion body and the second end expansion body are arranged at the first end and the second end of the pin rod correspondingly and used for abutting against the hole walls of the connecting holes after being expanded in the two connecting holes correspondingly. The two middle expansion bodies are arranged at the positions, between the first end expansion body and the second end expansion body, of the pin rod and used for abutting against the mounting hole after being expanded in the mounting hole. The excavator bucket has the advantage that the bucket body and the excavator bucket can be conveniently and rapidly fixed and disassembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of framework revetment protection, in particular to a disposable forming excavator bucket for framework revetment excavation trench. BACKGROUND

[0002] In the framework slope protection construction process, there are long time-consuming excavation, large core soil damage range, repeated trimming, even need large amount of concrete to fill adjustment line, large amount of backfilling in later period, mainly for soil section, soil body is easy to collapse, excavation line is not straight, excavation section is uneven, need to spend a lot of time manual trimming, and in the excavation process, the operation range of the excavator is large, the core soil is damaged seriously, the construction standardization is reduced, which is not conducive to water protection, and has a great negative impact on the construction image of the enterprise.

[0003] The existing framework slope protection needs to disassemble the pins on the bucket teeth of the original excavator bucket when excavating the main framework, and then needs to weld small buckets with bucket teeth on the bucket, and then reinstall the pins in the installation holes to fix them. This way, other tools are needed to assist in disassembly and fixation, such as using a hammer to hammer the pin shaft into or out of the installation hole of the bucket teeth. It is not very convenient to use. UTILITARY MODEL

[0004] Therefore, the utility model provides a disposable forming excavator bucket for framework revetment excavation trench, so as to solve or at least alleviate the above problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a disposable forming excavator bucket for framework revetment excavation trench, which comprises a bucket body, a tooth sleeve, a connecting hole and an expansion type connecting assembly. The tooth sleeve is fixedly installed on the bucket for sleeving the bucket teeth. The connecting hole is provided on both sides of the tooth sleeve, and the inner diameter of the connecting hole is larger than that of the installation hole of the bucket teeth.

[0006] The expansion type connecting assembly comprises a pin rod, a first end expansion body, a second end expansion body and two middle expansion bodies. The pin rod comprises 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 respectively expanded in the two connecting holes to abut against the hole wall of the connecting hole. The two middle expansion bodies are arranged on the pin rod between the first end expansion body and the second end expansion body, and are expanded in the installation hole to abut against the installation hole.

[0007] In the disposable forming excavator bucket for skeleton revetment excavation groove as described above, optionally, the first end expansion body comprises a first end taper sleeve and a first end expansion block, the first end taper sleeve is fixedly sleeved on the first end of the pin rod, and the first end expansion block is slidably arranged outside the first end taper sleeve; when the first end taper sleeve is displaced towards the second end of the pin rod relative to the first end expansion block, the first end expansion block is driven to be displaced radially away from the center of the first end taper sleeve.

[0008] In the disposable forming excavator bucket for skeleton revetment excavation groove as described above, optionally, a first end sliding groove is formed on the first end taper sleeve, and a first end sliding block is fixedly arranged on the side of the first end expansion block facing the center of the first end taper sleeve; the first end sliding block is in sliding cooperation with the first end sliding groove.

[0009] In the disposable forming excavator bucket for skeleton revetment excavation groove as described above, optionally, the second end expansion body comprises a second end taper sleeve and a second end expansion block, the second end expansion block is slidably sleeved on the second end of the pin rod, and the second end expansion block is slidably arranged outside the first end taper sleeve; when the second end taper sleeve is displaced towards the first end of the pin rod relative to the second end expansion block, the second end expansion block is driven to be displaced radially away from the center of the second end taper sleeve.

[0010] In the disposable forming excavator bucket for skeleton revetment excavation groove as described above, optionally, a second end sliding groove is formed on the second end taper sleeve, and a second end sliding block is fixedly arranged on the side of the second end expansion block facing the center of the second end taper sleeve; the second end sliding block is in sliding cooperation with the second end sliding groove.

[0011] In the disposable forming excavator bucket for skeleton revetment excavation groove as described above, optionally, the middle expansion body comprises a sleeve, a central hole, an outer side plane and an inner side inclined plane; the central hole is formed in the center of the sleeve, the sleeve is sleeved on the pin rod through the central hole, the inner diameter of the central hole is larger than the outer diameter of the pin rod, the side of the sleeve opposite to the other sleeve is the outer side plane, and the sides of the two sleeves opposite to each other are the inner side inclined planes in cooperation with each other.

[0012] In the disposable forming excavator bucket for skeleton revetment excavation groove as described above, optionally, the side of the first end expansion block and the second end expansion block facing the pin rod comprises, from outside to inside, an outer arc surface, a tapered surface and an inner arc surface in sequence; the first end taper sleeve and the second end taper sleeve comprise, from outside to inside, a cylindrical body and a tapered body; the inner diameters of the outer arc surface and the inner arc surface are adapted to the outer diameter of the cylindrical body; the outer diameter of the smaller end of the tapered body is smaller than the inner diameter of the mounting hole, and the inner end of the tapered body makes the middle expansion body perform expansion movement by extruding the sleeve inward.

[0013] Optionally, limit blocks are fixedly arranged on the circumferential surfaces of the first end taper sleeve and the second end taper sleeve, and limit grooves for inserting the limit blocks are formed in the connecting holes.

[0014] Optionally, a threaded section is arranged at one end of the second end taper sleeve, and a jam nut is threadedly sleeved on the threaded section.

[0015] The special disposable forming excavator bucket for skeleton revetment trench excavation has the advantages that 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 the first end expansion body and the middle expansion body can be inserted into the connecting hole and the mounting hole, and the bucket body and the bucket are fixed by rotating the jam nut to make the first end expansion body and the second end expansion body expand against the inner wall of the connecting hole and the middle expansion body expand against the inner wall of the mounting hole, so the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] The disclosure of the present application will be more apparent with reference to the drawings. It should be understood that the drawings are only for the purpose of illustration, and are not intended to limit the scope of protection of the present application. In the drawings:

[0017] Figure 1 Fig. 4 is a schematic view of the special disposable forming excavator bucket for skeleton revetment trench excavation connected with the excavator bucket.

[0018] Figure 2 Fig. 5 is a sectional view of the special disposable forming excavator bucket for skeleton revetment trench excavation. Figure 1

[0019] Figure 3 Fig. 6 is an enlarged view of position A in Fig. 5. Figure 2

[0020] Figure 4 Fig. 7 is an enlarged view of position B in Fig. 5. Figure 2

[0021] Figure 5 Fig. 8 is a sectional view of the special disposable forming excavator bucket for skeleton revetment trench excavation. Figure 2

[0022] Figure 6 Fig. 9 is an enlarged view of position C in Fig. 8. Figure 5

[0023] Figure 7 Fig. 10 is a connection schematic view of the pin, the first end expansion body and the middle expansion body.

[0024] Figure 8 Fig. 11 is a structure schematic view of the second end expansion body.

[0025] ​​​​​Figure 9 Schematic diagram of the structure of the second end slider.

[0026] Figure 10 Schematic diagram of the structure of the central expansion body.

[0027] Figure markings: 1-bucket body; 2-gear sleeve; 3-connecting hole; 4-pin rod; 5-first end expansion body; 5.1-first end tapered sleeve; 5.2-first end expansion block; 5.3-first end slide; 5.4-first end slider; 6-second end expansion body; 6.1-second end tapered sleeve; 6.2-second end expansion block; 6.3-second end slide; 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 following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a 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 making creative efforts 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 specially used for excavating trenches in skeleton slope protection, comprising a bucket body 1, a tooth sleeve 2, a connecting hole 3 and an expansion connection assembly. The tooth sleeve 2 is fixedly mounted on the hopper and is used to sleeve the bucket teeth of the bucket. The connecting holes 3 are formed 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 tooth.

[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] Firstly, before use, the tooth sleeve 2 is sleeved on the excavator tooth, so that the connecting hole 3 corresponds to the mounting hole on the excavator tooth, the pin rod 4 is inserted into the connecting hole 3, so that the middle expansion body 7 is inserted into the inside of the mounting hole on the excavator tooth, the first end expansion body 5 is inserted into the inside of the connecting hole 3 on one side, and the second end expansion body 6 is inserted into the inside of the connecting hole 3 on the other side. After insertion, the first end expansion body 5 and the second end expansion body 6 are expanded, and after expansion, they are used to abut 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, and after expansion, it is used to abut against the inner wall of the mounting hole on the excavator tooth, so that the connecting hole 3, the mounting hole of the excavator tooth and the center of the pin rod 4 are on the same line, and the effect of fixing and installing the bucket body 1 on the excavator tooth is achieved.

[0032] As shown in Figure 6 and Figure 7 , the first end expansion body 5 includes a first end taper sleeve 5.1 and a first end expansion block 5.2. The first end taper 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 outside the first end taper sleeve 5.1. When the first end taper sleeve 5.1 is displaced towards 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 be displaced radially away from the center of the first end taper 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 on the excavator tooth. When the first end expansion body 5 moves towards the mounting hole on the excavator tooth, the first end expansion block 5.2 is blocked by the excavator tooth, the first end taper sleeve 5.1 continues to move, and the first end expansion body 5 is displaced radially away from the center of the first end taper sleeve 5.1 and abuts against the inner wall of the connecting hole 3 on one side.

[0034] As shown in Figure 7 , the first end taper sleeve 5.1 is provided with a first end sliding groove 5.3, and the first end expansion block 5.2 is fixedly provided with a first end sliding block 5.4 on the side facing the center of the first end taper sleeve 5.1. The first end sliding block 5.4 is in sliding cooperation with the first end sliding groove 5.3.

[0035] The first end sliding groove 5.3 is L-shaped, the first end sliding block 5.4 slides inside the first end sliding groove 5.3, and when the first end sliding block 5.4 slides in the inclined area, the first end expansion body 5 is displaced radially away from the center of the first end taper sleeve 5.1. When the first end sliding block 5.4 slides in the horizontal area, the first end expansion body 5 remains in the state of abutting against the inner wall of the connecting hole 3, the first end taper sleeve 5.1 continues to move towards the inside of the mounting hole of the excavator tooth, and is inserted into the inside of the mounting hole.

[0036] As shown in Figure 8As shown, the second end expander 6 includes a second end taper sleeve 6.1 and a second end expansion block 6.2, the second end expansion block 6.2 is sleeved on the second end of the pin shaft 4, the second end expansion block 6.2 is arranged outside the first end taper sleeve, when the second end taper sleeve 6.1 is displaced towards the first end of the pin shaft 4, the second end expansion block 6.2 is driven to be displaced radially away from the center of the second end taper sleeve 6.1.

[0037] When the second end expander 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 the inner diameter of the connecting hole 3 is larger than the inner diameter of the mounting hole of the excavator bucket tooth, when the second end expander 6 is moved towards the mounting hole of the excavator bucket tooth, the second end expansion block 6.2 is blocked by the excavator bucket tooth, the second end taper sleeve 6.1 continues to move, and the second end expander 6 is displaced radially away from the center of the second end taper sleeve 6.1 and abuts against the inner wall of the other connecting hole 3.

[0038] As shown, Figure 8 the second end taper sleeve 6.1 is provided with a second end sliding groove 6.3, and the side surface of the second end expansion block 6.2 facing the center of the second end taper sleeve 6.1 is fixedly provided with a second end sliding block 6.4, and the second end sliding block 6.4 is in sliding cooperation with the second end sliding groove 6.3.

[0039] The second end sliding groove 6.3 is L-shaped, the second end sliding block 6.4 slides in the second end sliding groove 6.3, when the second end sliding block 6.4 slides in the inclined area, the second end expander 6 is displaced radially away from the center of the second end taper sleeve 6.1, when the second end sliding block 6.4 slides in the horizontal area, the second end expander 6 remains in the state of abutting against the inner wall of the connecting hole 3, the second end taper sleeve 6.1 continues to move towards the inside of the mounting hole of the excavator bucket tooth, and is inserted into the inside of the mounting hole.

[0040] As shown, Figure 7 and Figure 10 the middle expander 7 includes a sleeve 7.1, a center hole 7.2, an outer side plane 7.3 and an inner side inclined plane 7.4, the center hole 7.2 is arranged in the center of the sleeve 7.1, the sleeve 7.1 is sleeved on the pin shaft 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 shaft 4, the side surface of the two sleeves 7.1 facing away from each other is the outer side plane 7.3, and the side surface of the two sleeves 7.1 facing each other is the inner side inclined plane 7.4.

[0041] When the first end taper sleeve 5.1 and the second end taper sleeve 6.1 are inserted into the mounting hole, the opposite sides of the first end taper sleeve 5.1 and the second end taper sleeve respectively contact the outer side planes 7.3 of the two sleeves 7.1, when the first end taper sleeve 5.1 and the second end taper sleeve 6.1 drive the sleeves 7.1 to move, the two sleeves 7.1 will move radially away from the center of the pin shaft 4 along the inner side inclined planes 7.4 and abut against the inner wall of the mounting hole of the excavator bucket tooth.

[0042] As shown in Figure 9 , the first end expansion block 5.2 and the second end expansion block 6.2 include, from outside to inside, an outer arc surface 8, a tapered surface 9, and an inner arc surface 10 towards one side of the pin shaft 4, the first end tapered sleeve 5.1 and the second end tapered sleeve 6.1 include, from outside to inside, a cylindrical body 11 and a tapered body 12, the inner diameters of the outer arc surface 8 and the inner arc surface 10 are adapted to the outer diameter of the cylindrical body 11, the outer diameter of the smaller end of the tapered body 12 is smaller than the inner diameter of the mounting hole, and the inner side end of the tapered body 12 makes the middle expansion body 7 expand by extruding the sleeve 7.1 inward.

[0043] The first end expansion body 5 and the second end expansion body 6 are in an unexpanded state, the outer arc surface 8 is in contact with the cylindrical body 11, and the tapered surface 9 is in contact with the tapered body 12, at which time it can be inserted into the inside of the connecting hole 3, during displacement, the first end expansion block 5.2 and the second end expansion block 6.2 are moved towards the excavator tooth mounting hole, the relative surfaces of the first end expansion block 5.2 and the second end expansion block 6.2 are in contact with the outer wall of the excavator tooth, when the first end tapered sleeve 5.1 and the second end tapered sleeve 6.1 continue to displace, the tapered surface 9 follows the tapered body 12 along the radial direction away from the center of the pin shaft 4 and abuts against the inner wall of the connecting hole 3, when the first end tapered sleeve 5.1 and the second end tapered sleeve 6.1 continue to displace, the inner arc surface 10 is in contact with the cylindrical body 11, allowing the first end tapered sleeve 5.1 and the second end tapered sleeve 6.1 to be inserted into the mounting hole of the excavator tooth.

[0044] As shown in Figure 6 , the circumferential surface of the first end tapered sleeve 5.1 and the second end tapered sleeve 6.1 is fixedly provided with a limiting block 13, and the connecting hole 3 is provided with a limiting groove 14 for inserting the limiting block 13.

[0045] When inserting the pin shaft 4, the limiting block 13 on the first end tapered sleeve 5.1 is inserted into the limiting groove 14 of the connecting hole 3, so that the pin shaft 4 is limited as a whole to prevent the pin shaft 4 from rotating, and when inserting the second end expansion body 6, the limiting block 13 on the second end tapered sleeve 6.1 is inserted into the limiting groove 14 of the connecting hole 3 on the other side to prevent the second end expansion body 6 from rotating.

[0046] As shown in Figure 6 and Figure 7 , the pin shaft 4 is provided with a threaded section 15 at one end of the second end tapered sleeve 6.1, and a jam 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 designated positions, the lock nut 16 is screwed on 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 limiting block 13 and the limiting groove 14, when the lock nut 16 is rotated, the first end expansion body 5 will be moved towards the second end expansion body 6, when the lock nut 16 contacts the second end expansion body 6, the second end expansion body 6 will be moved towards the first end expansion body 5, so that the first end expansion body 5 and the second end expansion body 6 can be expanded, when the first end taper sleeve 5.1 and the second end taper sleeve 6.1 are both inserted into the installation hole, the outer side plane 7.3 of the middle expansion body 7 is contacted, the middle expansion body 7 is expanded, 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 installation hole and the connecting hole 3 are on the same line, the function of fixing the bucket body 1 and the excavator bucket is achieved.

[0048] The technical scope of the utility model is not only limited to the contents in the above description, the person skilled in the art can make various deformations and modifications to the above embodiment without departing from the technical thought of the utility model, and these deformations and modifications should all belong to the scope of the utility model.

Claims

1. A one-time-use formwork excavator bucket for excavating a slope protection revetment trench, characterized by, The utility model relates to a kind of excavator bucket tooth connection structure, including bucket body (1), tooth sleeve (2), connecting hole (3) and expansion type connecting assembly, the tooth sleeve (2) is fixedly installed on hopper, for the tooth sleeve of excavator bucket is set, the connecting hole (3) is opened in the both sides of tooth sleeve (2), the inner diameter of connecting hole (3) is greater than the inner diameter of mounting hole on bucket tooth; The expansion type connecting assembly includes pin rod (4), first end expansion body (5), second end expansion body (6) and two middle expansion bodies (7), the pin rod (4) includes first end and 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), for respectively after expansion in two connecting holes (3) resist the hole wall of connecting hole (3), 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), for after expansion in mounting hole resist mounting hole.

2. A one-time use form digging machine bucket for excavating a revetment support trench as defined in claim 1 wherein, The first end expansion body (5) includes first end taper sleeve (5.1) and first end expansion block (5.2), the first end taper sleeve (5.1) is fixedly set in the first end of pin rod (4), the first end expansion block (5.2) is slidably arranged outside the first end taper sleeve (5.1), when the first end taper sleeve (5.1) is displaced to the second end of pin rod (4) relative to first end expansion block (5.2), first end expansion block (5.2) is driven to be displaced in radial direction away from the center of first end taper sleeve (5.1).

3. A one-time use form digging machine bucket for excavating a revetment support trench as defined in claim 2 wherein, First end slide groove (5.3) is opened in the first end taper sleeve (5.1), first end slider (5.4) is fixedly arranged on the side surface of first end expansion block (5.2) towards the center of first end taper sleeve (5.1), and first end slider (5.4) is slidably matched with first end slide groove (5.3).

4. A one-time use form digging machine bucket for excavating a revetment support trench as defined in claim 2 wherein, The second end expansion body (6) includes second end taper sleeve (6.1) and second end expansion block (6.2), the second end expansion block (6.2) is slidably set in the second end of pin rod (4), the second end expansion block (6.2) is slidably arranged outside the first end taper sleeve, and when the second end taper sleeve (6.1) is displaced to the first end of pin rod (4) relative to second end expansion block (6.2), second end expansion block (6.2) is driven to be displaced in radial direction away from the center of second end taper sleeve (6.1).

5. A one-time use form digging machine bucket for excavating a revetment support trench as defined in claim 4 wherein, Second end slide groove (6.3) is opened in the second end taper sleeve (6.1), and second end slider (6.4) is fixedly arranged on the side surface of second end expansion block (6.2) towards the center of second end taper sleeve (6.1), and second end slider (6.4) is slidably matched with second end slide groove (6.3).

6. A one-time use form digging machine bucket for excavating a revetment support trench as defined in claim 4 wherein, The middle expansion body (7) comprises sleeves (7.1), central holes (7.2), outer planes (7.3) and inner inclined planes (7.4), the central holes (7.2) are arranged at the centers of the sleeves (7.1), the sleeves (7.1) are sleeved on the pin shaft (4) through the central holes (7.2), the inner diameters of the central holes (7.2) are greater than the outer diameter of the pin shaft (4), the opposite sides of the two sleeves (7.1) are the outer planes (7.3), and the opposite sides of the two sleeves (7.1) are the inner inclined planes (7.4) matched with each other.

7. A one-time use form digging machine bucket for excavating a revetment support trench as defined in claim 6 wherein, The outer arc surfaces (8), the taper surfaces (9) and the inner arc surfaces (10) are sequentially arranged from the outside to the inside on the side of the first end expansion block (5.2) and the second end expansion block (6.2) facing the pin shaft (4), the first end taper sleeve (5.1) and the second end taper sleeve (6.1) comprise cylindrical bodies (11) and taper bodies (12) from the outside to the inside, the inner diameters of the outer arc surfaces (8) and the inner arc surfaces (10) are matched with the outer diameter of the cylindrical bodies (11), the outer diameter of the smaller end of the taper body (12) is smaller than the inner diameter of the mounting hole, and the inner end of the taper body (12) makes the middle expansion body (7) expand by extruding the sleeve (7.1) inward.

8. A one-time use form digging machine bucket for excavating a revetment support trench as defined in claim 4 wherein, The limiting blocks (13) are fixedly arranged on the circumferential surfaces of the first end taper sleeve (5.1) and the second end taper sleeve (6.1), and the limiting grooves (14) for the insertion of the limiting blocks (13) are arranged on the connecting hole (3).

9. A one-time use form digging machine bucket for excavating a revetment support trench as defined in claim 4 wherein, The pin shaft (4) is provided with a threaded section (15) at one end of the second end taper sleeve (6.1), and the threaded section (15) is threadedly sleeved with the jacking nut (16).

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