Knife group structure and wall breaking machine comprising same

Abstract

The utility model discloses a knife tackle structure and a wall breaking machine comprising the knife tackle structure. The cutter group structure comprises a transmission shaft, the transmission shaft comprises a first connecting shaft and a second connecting shaft, the second connecting shaft is connected to the upper end of the first connecting shaft, and a clamping column protrudes from the side wall of the second connecting shaft; the knife assembly comprises a knife rest and a blade connected to the knife rest, a connecting hole is formed in the knife rest, the knife rest is arranged on the first connecting shaft in a sleeving mode through the connecting hole, a clamping block protrudes in the connecting hole, and the lower side of the clamping block is used for abutting against the upper end of the first connecting shaft; the transmission shaft and the knife rest can relatively rotate between a locking position and an unlocking position; when the clamping block is located at the locking position, the upper side of the clamping block is clamped with the clamping column to fix the relative positions of the tool rest and the transmission shaft in the axial direction; in the unlocking position, the upper side of the clamping block is separated from the clamping column, and the tool rest can move in the axial direction of the transmission shaft; wherein the relative rotation angle alpha between the clamping column and the clamping block is defined to be larger than or equal to 30 degrees and smaller than or equal to 60 degrees.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen equipment, in particular to a knife set structure and a wall breaker including the knife set structure. Background Art

[0002] With the continuous improvement of modern living standards, a variety of wall breaker products with rich functions have emerged on the market, which have greatly enriched people's diet and daily life experience. The diversified functions of wall breakers include, but are not limited to, soybean milk grinding, fruit juice extraction, rice paste making, minced meat grinding, ice crushing, coffee brewing, and even facial mask preparation, fully demonstrating its dual potential in the kitchen and beauty fields. These devices usually appear in the form of soybean milk machines, blenders or high-end wall breakers, focusing on the fine crushing and mixing of food.

[0003] In order to improve the user experience, especially for the cleaning problem after using the wall breaker, some products on the market have adopted innovative designs, that is, the stirring cutter head assembly is designed as a detachable structure and directly installed at the bottom of the stirring cup. The original intention of this design is to simplify the cleaning process and allow users to easily remove the cutter head assembly for in-depth cleaning. However, in actual operation, the disassembly process of the stirring cutter head assembly is still cumbersome and not convenient enough, bringing certain inconvenience to users. Summary of the Utility Model

[0004] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a knife set structure and a wall breaker including the knife set structure, aiming to achieve the stable installation and quick disassembly of the knife assembly on the transmission shaft, while ensuring the concentricity of the overall structure and the stability during high-speed rotation.

[0005] The technical solution adopted by the utility model to solve its problems is:

[0006] A knife set structure, comprising: a transmission shaft, including a first connecting shaft and a second connecting shaft, the second connecting shaft is connected to the upper end of the first connecting shaft, and a clamping column protrudes from the side wall of the second connecting shaft; a knife assembly, including a knife holder and blades connected to the knife holder, a connecting hole is provided in the knife holder, the knife holder is sleeved on the first connecting shaft through the connecting hole, a clamping block protrudes in the connecting hole, and the lower side of the clamping block is used to abut against the upper end of the first connecting shaft; the transmission shaft and the knife holder can rotate relative to each other between a locked position and an unlocked position; when in the locked position, the upper side of the clamping block is clamped with the clamping column to fix the relative position of the knife holder and the transmission shaft in the axial direction; when in the unlocked position, the upper side of the clamping block is separated from the clamping column, and the knife holder can move along the axial direction of the transmission shaft; wherein, the relative rotation angle between the clamping column and the clamping block is defined as α, and 30° ≤ α ≤ 60°.

[0007] According to some embodiments of the present invention, the diameter of the first connecting shaft is defined as D1, the diameter of the second connecting shaft is defined as D2, and D1 and D2 satisfy the relationship: 0.5≦D2 / D1≦0.8.

[0008] According to some embodiments of the utility model, two clamping posts are provided, two clamping blocks are provided, the two clamping posts are respectively provided on both sides of the second connecting shaft, and the two clamping posts and the clamping blocks are matched one by one.

[0009] According to some embodiments of the present invention, the clamping column extends transversely, and the length between the end faces of the two clamping columns is defined as D3; D3 and D1 satisfy the relationship: 0.85≦D3 / D1≦1.

[0010] According to some embodiments of the present invention, the maximum width between the lower sides of the two card blocks is defined as L2; ​​L2 and D1 satisfy the relationship: 0.8≦L2 / D1≦0.95.

[0011] According to some embodiments of the utility model, a clearance groove is formed between the two clamping blocks, and when the transmission shaft and the tool holder are in the unlocking position, the clamping column is located in the clearance groove; the diameter of the clamping column is defined as D4, and the width of the clearance groove is defined as L1, and D4 and L1 satisfy the relationship: 0.85≦D4 / L1≦1.

[0012] According to some embodiments of the present invention, 2mm≦D4≦4mm.

[0013] According to some embodiments of the present invention, 7mm≦D1≦10mm.

[0014] According to some embodiments of the utility model, the tool holder includes a tool holder head and a tool holder rod body, the tool holder head is detachably connected to the upper end of the tool holder rod body, the connecting hole passes through the tool holder head to the tool holder rod body, and the clamping block is located at the tool holder head.

[0015] According to some embodiments of the utility model, the lower side of the blocking block has a first guide wall that is inclined, and the upper side of the blocking block has a limiting wall and a second guide wall that is inclined, the limiting wall, the second guide wall and the first guide wall are connected in sequence, the first guide wall is used to guide the clamping column to move toward the upper side of the blocking block, and the second guide wall is used to guide the clamping column to move toward the limiting wall; when the transmission shaft and the tool holder are in the locking position, the clamping column and the limiting wall are clamped together.

[0016] In addition, the utility model also provides a wall breaking machine, comprising the knife group structure as described above.

[0017] In summary, the knife set structure provided by the present utility model and the wall breaker including this knife set structure have at least the following technical effects:

[0018] The tool holder is designed to be tightly sleeved on the transmission shaft from top to bottom. The precise fit between its connection hole and the first connecting shaft ensures the concentricity of the overall structure, effectively preventing the shaking phenomenon that may occur during high-speed rotation. Moreover, the lower side of the clamping block can abut against the upper end of the first connecting shaft, which not only prevents the excessive sinking of the tool holder but also enhances the connection stability. After sleeving the tool holder on the transmission shaft, by relatively rotating the tool holder and the transmission shaft to the locking position, the clamping block can be cleverly clamped between the upper end of the first connecting shaft and the clamping column of the second connecting shaft, thereby restricting the free movement of the tool holder in the axial direction of the transmission shaft, and then realizing the stable installation of the tool assembly on the transmission shaft. When it is necessary to disassemble the tool assembly, only need to relatively rotate the tool holder and the transmission shaft to the unlocking position. At this time, the restriction on the movement of the tool holder by the clamping column is released, and the tool holder can easily slide upward along the transmission shaft and be directly pulled out, realizing the rapid disassembly of the tool assembly. In this way, the operation is relatively simple throughout the process of disassembly or installation, and the structural design is compact, effectively reducing the production cost. Importantly, by setting the relative rotation angle α between 30° and 60°, on the one hand, it avoids the problems of inconvenient disassembly and assembly and excessive rotational impact caused by too large a relative rotation angle α. On the other hand, it can also avoid the problem of looseness between the transmission shaft and the tool holder when the relative rotation angle α is too small and the transmission shaft and the tool holder are in the locking position. Description of the Drawings

[0019] Figure 1 It is a cross-sectional structure schematic diagram of the knife set structure of the embodiment of the present utility model;

[0020] Figure 2 It is an exploded structure schematic diagram of the knife set structure of the embodiment of the present utility model;

[0021] Figure 3 It is a state schematic diagram of the transmission shaft and the tool holder of the embodiment of the present utility model in the locked position;

[0022] Figure 4 It is a state schematic diagram of the transmission shaft and the tool holder of the embodiment of the present utility model in the unlocked position;

[0023] Figure 5 It is a structure schematic diagram of the transmission shaft of the embodiment of the present utility model from the first perspective;

[0024] Figure 6 It is a structure schematic diagram of the transmission shaft of the embodiment of the present utility model from the second perspective;

[0025] Figure 7 It is an exploded structure schematic diagram of the tool assembly of the embodiment of the present utility model;

[0026] Figure 8 The following is a schematic bottom view structure of the tool head of an embodiment of the present utility model;

[0027] Figure 9 The following is a schematic cross-sectional structure of the tool head of an embodiment of the present utility model;

[0028] Figure 10 The following is a schematic structure of the tool rest of an embodiment of the present utility model;

[0029] Figure 11 The following is a schematic cross-sectional structure of the tool rest of an embodiment of the present utility model;

[0030] Among them, the meanings of the reference numerals are as follows:

[0031] 1. Transmission shaft; 11. First connecting shaft; 12. Second connecting shaft; 121. Clamping post; 2. Tool assembly; 21. Tool rest; 211. Connecting hole; 212. Clamping block; 2121. First guiding wall; 2122. Second guiding wall; 2123. Anti-detachment step; 2124. Limiting wall; 2125. Arc-shaped side wall; 213. Relief groove; 214. Holding groove; 215. Tool head; 216. Tool rest rod body; 22. Blade; 23. Nut; 3. Mounting disc. Specific embodiments

[0032] For better understanding and implementation, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0035] The following will further describe the present utility model in detail with reference to the accompanying drawings.

[0036] Please refer to Figures 1 to 4, this embodiment discloses a knife set structure, including a transmission shaft 1 and a knife assembly 2; the knife assembly 2 includes a tool holder 21 and a blade 22, and the blade 22 is connected to the tool holder 21; the transmission shaft 1 includes a first connecting shaft 11 and a second connecting shaft 12, the second connecting shaft 12 is connected to the upper end of the first connecting shaft 11, and a clamping post 121 protrudes from the side wall of the second connecting shaft 12; a connecting hole 211 is provided in the tool holder 21, and the tool holder 21 is sleeved on the first connecting shaft 11 through the connecting hole 211, and a clamping block 212 protrudes in the connecting hole 211, and the lower side of the clamping block 212 is used to abut against the upper end of the first connecting shaft 11; the transmission shaft 1 and the tool holder 21 can rotate relative to each other between a locked position and an unlocked position; when in the locked position, the upper side of the clamping block 212 is clamped with the clamping post 121 to fix the relative position of the tool holder 21 and the transmission shaft 1 in the axial direction; when in the unlocked position, the upper side of the clamping block 212 is separated from the clamping post 121, and the tool holder 21 can move along the axial direction of the transmission shaft 1. Wherein, the relative rotation angle between the clamping post 121 and the clamping block 212 is defined as α, and 30° ≤ α ≤ 60°.

[0037] In the knife set structure disclosed in this embodiment, the tool holder 21 is designed to be tightly sleeved on the transmission shaft 1 from top to bottom. The precise fit between its connecting hole 211 and the first connecting shaft 11 ensures the concentricity of the overall structure and effectively prevents the shaking phenomenon that may occur during high-speed rotation; moreover, the lower side of the clamping block 212 can abut against the upper end of the first connecting shaft 11, which not only prevents the excessive sinking of the tool holder 21 but also enhances the connection stability; after the tool holder 21 is sleeved on the transmission shaft 1, by relatively rotating the tool holder 21 and the transmission shaft 1 to the locked position, the clamping block 212 can be cleverly clamped between the upper end of the first connecting shaft 11 and the clamping post 121 of the second connecting shaft 12, thereby restricting the free movement of the tool holder 21 in the axial direction of the transmission shaft 1, and then realizing the stable installation of the knife assembly 2 on the transmission shaft 1; when the knife assembly 2 needs to be disassembled, only need to relatively rotate the tool holder 21 and the transmission shaft 1 to the unlocked position. At this time, the movement restriction of the clamping post 121 on the tool holder 21 is released, and the tool holder 21 can easily slide upward along the transmission shaft 1 and be directly pulled out, realizing the rapid disassembly of the knife assembly 2. In this way, the operation is relatively simple during the whole process of disassembly or installation, and the structural design is compact, effectively reducing the production cost. Importantly, by setting the relative rotation angle α between 30° and 60°, on the one hand, it avoids the problems of inconvenient disassembly and assembly and excessive rotational impact caused by too large a relative rotation angle α, and on the other hand, it can also avoid the problem of loosening between the transmission shaft 1 and the tool holder 21 when the transmission shaft 1 and the tool holder 21 are in the locked position due to too small a relative rotation angle α.

[0038] As Figure 1 and Figure 2 shown, specifically, in this embodiment, the knife set structure further includes a mounting disc 3, and the first connecting shaft 11 is connected to the mounting disc 3.

[0039] As Figure 7 shown, specifically, in this embodiment, the tool rest 21 includes a tool rest head 215 and a tool rest rod 216. The tool rest head 215 is detachably connected to the upper end of the tool rest rod 216. The connection hole 211 penetrates from the tool rest head 215 to the tool rest rod 216, and the clamping block 212 is located on the tool rest head 215.

[0040] As Figure 1 and Figure 7 shown, preferably, in this embodiment, a gripping groove 214 for human hand to grip is provided on the outer side wall of the tool rest rod 216, and the human hand can act on the gripping groove 214 to disassemble and assemble the tool assembly 2.

[0041] As Figure 5 and Figure 6 shown, specifically, in this embodiment, the diameter of the first connecting shaft 11 is defined as D1, and the diameter of the second connecting shaft 12 is defined as D2. Preferably, in this embodiment, D1 and D2 satisfy the relationship: 0.5 ≤ D2 / D1 ≤ 0.8. In this way, by setting the ratio of D2 to D1 between 0.5 and 0.8, it is ensured that the tool group structure adopting this disassembly and assembly method can maintain high running stability and safety during work, providing a more reliable use experience for users.

[0042] Preferably, in this embodiment, 7mm ≤ D1 ≤ 10mm.

[0043] As Figure 5 , Figure 6 and Figure 10 shown, preferably, in this embodiment, in order to further enhance the connection stability between the transmission shaft 1 and the tool rest 21 in the locked position, two clamping columns 121 are provided, and these two clamping columns 121 are respectively arranged on both sides of the second connecting shaft 12. Correspondingly, the clamping blocks 212 on the tool rest 21 are also designed as two, which are in one-to-one correspondence with these two clamping columns 121, thus forming a balanced and stable support structure. In addition, the cooperation between the double clamping columns 121 and the double clamping blocks 212 also improves the redundancy and fault tolerance of the overall structure. Even if one of the clamping points is slightly impacted or worn, the other clamping point can still continue to provide sufficient supporting force, ensuring the continuous stability and safety of the connection.

[0044] As Figure 5 and Figure 6 shown, specifically, in this embodiment, the clamping columns 121 extend horizontally, and the length between the end faces of the two clamping columns 121 is defined as D3; D3 and D1 satisfy the relationship: 0.85 ≤ D3 / D1 ≤ 1; In this way, to further improve the safety factor of the tool group structure adopting this disassembly and assembly method during work.

[0045] As Figure 1 ,Figure 5 and Figure 9 Specifically, in this embodiment, the maximum width between the lower sides of the two clamping blocks 212 is defined as L2; preferably, in this embodiment, L2 and D1 satisfy the relationship: 0.8 ≤ L2 / D1 ≤ 0.95. In this way, it is beneficial for the lower side of the clamping block 212 to abut against the upper end of the first connecting shaft 11, thereby preventing the tool holder 21 from sinking excessively, that is, preventing the problem of misalignment in the installation of the tool assembly 2.

[0046] Such as Figure 3 , Figure 4 , Figure 8 and Figure 10 As shown in , specifically, in this embodiment, a relief groove 213 is formed between the two clamping blocks 212. When the transmission shaft 1 and the tool holder 21 are in the unlocked position, the clamping post 121 is located in the relief groove 213. In this way, when disassembling the tool assembly 2 from the transmission shaft 1, collision interference between the clamping post 121 and the clamping block 212 can be avoided, which is beneficial for the tool holder 21 to move upward along the transmission shaft 1 to achieve the disassembly of the tool assembly 2; specifically, the diameter of the clamping post 121 is defined as D4, and the groove width of the relief groove 213 is defined as L1. Preferably, D4 and L1 satisfy the relationship: 0.85 ≤ D4 / L1 ≤ 1 to avoid mutual interference between the clamping post 121 and the relief groove 213. Preferably, in this embodiment, 2 mm ≤ D4 ≤ 4 mm.

[0047] Such as Figure 10 and Figure 11 As shown in , preferably, in this embodiment, the lower side of the clamping block 212 has an inclined first guiding wall 2121. It can be understood that when the tool holder 21 is sleeved on the transmission shaft 1 from top to bottom, the clamping post 121 will first contact the inclined first guiding wall 2121, and the clamping post 121 and the first guiding wall 2121 will slide relative to each other. The first guiding wall 2121 precisely guides the clamping post 121 to smoothly enter the upper side area of the clamping block 212 with its inclined angle, laying a good foundation for the subsequent clamping operation between the upper side of the clamping block 212 and the clamping post 121.

[0048] More preferably, in this embodiment, the upper side of the clamping block 212 has a limiting wall 2124 and an inclined second guiding wall 2122. The limiting wall 2124, the second guiding wall 2122 and the first guiding wall 2121 are connected in sequence. Specifically, the limiting wall 2124 and the second guiding wall 2122 are connected at an angle, and the second guiding wall 2122 is opposite to the first guiding wall 2121 and is also connected at an angle. Such a layout is not only beautiful but also realizes precise control of the movement trajectory of the clamping post 121. When the transmission shaft 1 and the tool holder 21 reach the locked position, the clamping post 121 will move towards the limiting wall 2124 under the guidance of the second guiding wall 2122 and finally form a stable clamping state with it.

[0049] Furthermore, in the present embodiment, in order to improve the clamping stability between the clamping post 121 and the limiting wall 2124, an anti - detachment step 2123 is added between the limiting wall 2124 and the second guiding wall 2122. After the transmission shaft 1 and the tool holder 21 are completely locked, the clamping post 121 will be firmly clamped between the limiting wall 2124 and the anti - detachment step 2123, effectively preventing the possible detachment of the clamping post 121 during high - speed rotation, thus ensuring that the transmission shaft 1 can stably drive the tool assembly 2 to work.

[0050] Preferably, in the present embodiment, the clamping block 212 has an arc - shaped side wall 2125. The arc - shaped side walls 2125 of the two clamping blocks 212 are arranged oppositely, and the second connecting shaft 12 is rotatably connected between the two arc - shaped side walls 2125. The cooperation between the second connecting shaft 12 and the two arc - shaped side walls 2125 can provide guidance for the relative rotation between the transmission shaft 1 and the tool holder 21, thereby improving the rotational stability between the transmission shaft 1 and the tool holder 21 and avoiding wobbling when the transmission shaft 1 and the tool holder 21 rotate relative to each other.

[0051] As Figure 1 and Figure 7 shown, preferably, in the present embodiment, the tool assembly 2 further includes a nut 23. The blade 22 is connected to the lower end of the tool holder 21, and the nut 23 is threadedly connected to the lower end of the tool holder 21 to fix the relative position of the blade 22 and the tool holder 21.

[0052] In addition, the present embodiment also provides a wall - breaking machine, including the tool - group structure as described above. This wall - breaking machine has all the advantages of the above - mentioned tool - group structure and will not be elaborated here.

[0053] In summary, the tool - group structure disclosed by the present utility model and the wall - breaking machine including this tool - group structure can at least bring the following beneficial technical effects:

[0054] 1) The operation of the tool assembly 2 is relatively simple throughout the process of disassembly or installation, and the structural design is compact, effectively reducing the production cost;

[0055] 2) By setting the relative rotation angle α between 30° and 60°, it is possible to avoid problems such as inconvenient disassembly and assembly and excessive rotational impact caused by too large a relative rotation angle α, and it is also possible to avoid problems such as loosening between the transmission shaft 1 and the tool holder 21 when the relative rotation angle α is too small and the transmission shaft 1 and the tool holder 21 are in the locked position;

[0056] 3) By setting the ratio of D2 to D1 between 0.5 and 0.8, it is ensured that the tool - group structure adopting this disassembly and assembly method can maintain high operating stability and safety during work, providing a more reliable use experience for users;

[0057] 4) By setting the ratio of D3 to D1 between 0.85 and 1, the safety factor of the tool set structure using this disassembly and assembly method during operation is further improved.

[0058] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. The knife group structure is characterized by: include: A transmission shaft (1) comprises a first connecting shaft (11) and a second connecting shaft (12), wherein the second connecting shaft (12) is connected to the upper end of the first connecting shaft (11), and a clamping column (121) protrudes from a side wall of the second connecting shaft (12); The knife assembly (2) comprises a knife holder (21) and a blade (22) connected to the knife holder (21); a connecting hole (211) is provided in the knife holder (21); the knife holder (21) is sleeved on the first connecting shaft (11) through the connecting hole (211); a clamping block (212) protrudes from the connecting hole (211); the lower side of the clamping block (212) is used to abut against the upper end of the first connecting shaft (11); the transmission shaft (1) and the knife holder (21) can rotate relative to each other between a locked position and an unlocked position When in the locked position, the upper side of the clamping block (212) is clamped with the clamping column (121) to fix the relative axial position of the tool holder (21) and the transmission shaft (1); when in the unlocked position, the upper side of the clamping block (212) is separated from the clamping column (121), and the tool holder (21) can move along the axial direction of the transmission shaft (1); wherein the relative rotation angle between the clamping column (121) and the clamping block (212) is defined as α, 30°≦α≦60°.

2. The knife assembly structure according to claim 1, characterized in that: The diameter of the first connecting shaft (11) is defined as D1, and the diameter of the second connecting shaft (12) is defined as D2, and D1 and D2 satisfy the relationship: 0.5≦D2 / D1≦0.

8.

3. The knife assembly structure according to claim 2, characterized in that: Two clamping columns (121) are provided, and two clamping blocks (212) are provided. The two clamping columns (121) are respectively provided on both sides of the second connecting shaft (12), and the two clamping columns (121) and the clamping blocks (212) are matched one by one.

4. The knife assembly structure according to claim 3, characterized in that: The clamping posts (121) extend transversely, and the length between the end faces of the two clamping posts (121) is defined as D3; D3 and D1 satisfy the relationship: 0.85≦D3 / D1≦1.

5. The knife assembly structure according to claim 3, characterized in that: The maximum width between the lower sides of the two card blocks (212) is defined as L2; ​​L2 and D1 satisfy the relationship: 0.8≦L2 / D1≦0.

95.

6. The knife assembly structure according to claim 3, characterized in that: A clearance groove (213) is formed between the two clamping blocks (212); when the transmission shaft (1) and the tool holder (21) are in the unlocking position, the clamping column (121) is located in the clearance groove (213); the diameter of the clamping column (121) is defined as D4, the width of the clearance groove (213) is defined as L1, and D4 and L1 satisfy the relationship: 0.85≦D4 / L1≦1.

7. The knife assembly structure according to claim 6, characterized in that: 2mm≦D4≦4mm.

8. The knife assembly structure according to any one of claims 1 to 7, characterized in that: The tool holder (21) comprises a tool holder head (215) and a tool holder rod body (216); the tool holder head (215) is detachably connected to the upper end of the tool holder rod body (216); the connecting hole (211) passes through the tool holder head (215) to the tool holder rod body (216); and the clamping block (212) is located on the tool holder head (215).

9. The knife assembly structure according to any one of claims 1 to 7, characterized in that: The lower side of the clamping block (212) is provided with a first guide wall (2121) which is arranged obliquely, and the upper side of the clamping block (212) is provided with a limiting wall (2124) and a second guide wall (2122) which is arranged obliquely; the limiting wall (2124), the second guide wall (2122) and the first guide wall (2121) are connected in sequence; the first guide wall (2121) is used to guide the clamping column (121) to move toward the upper side of the clamping block (212), and the second guide wall (2122) is used to guide the clamping column (121) to move toward the limiting wall (2124); when the transmission shaft (1) and the tool holder (21) are in the locking position, the clamping column (121) and the limiting wall (2124) are clamped with each other.

10. A wall breaking machine, characterized in that: It comprises a knife set structure as described in any one of claims 1 to 9.

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