A cutter for a diaphragm wall trenching machine

Abstract

The utility model relates to the milling tooth technical field of trenching machine, concretely relates to a kind of milling tooth for underground continuous wall trenching machine, including fixed frame, the bottom of fixed frame is rotatably connected with two rotary tooth discs, the outer wall of two rotary tooth discs is all fixedly connected with a plurality of equidistance evenly distributed hollow tooth seat, hollow tooth seat is provided with the tooth head of cutting soil and rock at one end away from rotary tooth disc, the inside of hollow tooth seat is provided with the replacement mechanism for the tooth head wear can be replaced, replacement mechanism includes the connecting disc fixedly connected in the bottom of hollow tooth seat inner wall, the top of connecting disc is provided with four first sliding grooves that are cross distribution.The present application significantly improves the replacement efficiency of tooth head compared with the prior art, without the need for overall replacement of the overall structure of the milling tooth, reduces maintenance cost and material loss, at the same time, simplifies the replacement operation process, reduces construction downtime, enhances the continuity and economy of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of milling gear technology for trenching machines, and more particularly to a milling gear for trenching machines used in diaphragm walls. Background Technology

[0002] Diaphragm walls are a widely used foundation construction technique in fields such as deep foundation pit support, underground structure seepage prevention, and slope reinforcement. As the main equipment for diaphragm wall trenching, the cutting efficiency and trenching quality of a twin-wheel trenching machine largely depend on the structure and performance of its milling teeth. Typically, a twin-wheel trenching machine is equipped with several milling teeth distributed on the outer wall of the milling wheel. These teeth cut the soil or rock strata in the ground through their front teeth to achieve efficient excavation of diaphragm wall sections. In existing technologies, the teeth on the milling teeth usually adopt a welded or integral fixed structure, and the tooth material is mostly cemented carbide to improve cutting ability and wear resistance.

[0003] During long-term construction, the teeth on existing milling gears are prone to wear and even breakage due to frequent contact with soil, rocks, and other media. This leads to decreased cutting efficiency, extended construction period, and affects the verticality and smoothness of the groove. Since the teeth on existing milling gears are mostly fixed structures, when the teeth are severely worn, it is not possible to replace the teeth individually. The entire milling gear must be replaced, resulting in high maintenance costs, significant material waste, and a complex, time-consuming, and labor-intensive replacement process. This increases downtime and is detrimental to the continuity and economy of the project. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a milling tooth for a diaphragm wall trenching machine, so as to solve the problem that the tooth head cannot be replaced separately and the entire milling tooth needs to be replaced, resulting in high maintenance costs and a lot of material waste.

[0005] Based on the above objectives, this utility model provides a milling tooth for a trenching machine for underground continuous walls, including a fixed frame. Two rotating toothed discs are rotatably connected to the bottom of the fixed frame. Multiple hollow tooth seats are fixedly connected to the outer walls of the two rotating toothed discs at equal and uniform intervals. A tooth head for cutting soil and rock is provided at the end of the hollow tooth seat away from the rotating toothed disc. A replacement mechanism is provided inside the hollow tooth seat for replacing the tooth head after it wears down.

[0006] Preferably, the replacement mechanism includes a connecting plate fixedly connected to the bottom of the inner wall of the hollow tooth holder. The top of the connecting plate has four first grooves arranged in a cross shape. A plug is slidably connected inside each of the first grooves. A push rod is fixedly connected to the top of each plug. A rotating disk is rotatably connected to the top of the connecting plate. The side wall of the rotating disk has four evenly distributed synchronous grooves, each with an arc shape. The top of the push rod passes through the synchronous groove. The side wall of the hollow tooth holder has a second groove. The hollow tooth holder has a cavity inside. A toggle rod is fixedly connected to the bottom of the rotating disk. The toggle rod passes through the connecting plate and enters the cavity. The side wall of the second groove has a through groove. One end of the toggle rod passes through the through groove and is fixedly connected to a push block. The push block is slidably connected inside the second groove. The bottom of the tooth head is fixedly connected to a mounting post. The bottom of the mounting post has a groove. The inner wall of the groove has four evenly distributed slots. When one end of the plug slides outward in the first groove, it enters the slot.

[0007] Preferably, the hollow tooth seat has a receiving cavity on its side wall, a spring is fixedly connected to the inner wall of the receiving cavity, a pressing block is fixedly connected to the bottom end of the spring, the bottom end of the pressing block is inserted into the second sliding groove, and a limiting groove is opened on the top of the push block. When the pressing block moves downward, it will enter the limiting groove.

[0008] Preferably, when the rotating disk rotates, it pushes the push rod to move through the synchronization groove. When the push rod moves, it drives the insert block to slide towards the slot and enter the slot.

[0009] Preferably, the outer wall of the mounting post and the inner wall of the hollow toothed seat are adapted to each other.

[0010] Preferably, the side wall of the lower pressure block near the limiting groove has an inclined surface, and the inner wall of the limiting groove has the same shape as one end of the lower pressure block.

[0011] Preferably, when the push block slides in the direction of the downward pressing block, the side wall of the push block will drive the downward pressing block to move upward through the inclined surface at one end of the downward pressing block.

[0012] The beneficial effects of this utility model are:

[0013] The milling teeth used in the trenching machine for diaphragm walls, through the interlocking structure of connecting discs, rotating discs, insert blocks, push blocks, limiting grooves, and pressing blocks, allow for individual replacement of the tooth heads, significantly improving the replacement efficiency. This eliminates the need to replace the entire milling tooth structure, reducing maintenance costs and material waste. Simultaneously, it simplifies the replacement process, reduces downtime, enhances the continuity and economy of equipment operation, and possesses excellent structural reliability and reusability, demonstrating significant engineering application value. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the hollow tooth base and tooth head of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the hollow tooth holder of this utility model;

[0018] Figure 4 This is a schematic diagram of the planar structure of the hollow tooth base and tooth head of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the groove and slot of this utility model;

[0020] Figure 6 This utility model Figure 2 Enlarged 3D structural diagram at point A.

[0021] The diagram is marked as follows:

[0022] 1. Fixed frame; 2. Rotating gear plate; 3. Hollow gear seat; 4. Gear head; 5. Connecting plate; 6. First slide groove; 7. Insert block; 8. Push rod; 9. Rotating plate; 10. Synchronization groove; 11. Second slide groove; 12. Cavity; 13. Actuating rod; 14. Through groove; 15. Push block; 16. Mounting post; 17. Groove; 18. Slot; 19. Receiving cavity; 20. Spring; 21. Pressing block; 22. Limiting groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 6 As shown, a milling gear for a trenching machine for diaphragm walls includes a fixed frame 1. Two rotating toothed discs 2 are rotatably connected to the bottom of the fixed frame 1. Multiple hollow tooth seats 3 are fixedly connected to the outer walls of the two rotating toothed discs 2 at equal and uniform intervals. A tooth head 4 for cutting soil and rock is provided at the end of the hollow tooth seat 3 away from the rotating toothed disc 2. A replacement mechanism is provided inside the hollow tooth seat 3 for replacing the tooth head 4 after it wears out.

[0026] Further, see attached document. Figures 1 to 5 As shown, the replacement mechanism includes a connecting plate 5 fixedly connected to the bottom of the inner wall of the hollow gear seat 3. The top of the connecting plate 5 has four first sliding grooves 6 arranged in a cross shape. Insert blocks 7 are slidably connected inside the first sliding grooves 6. A push rod 8 is fixedly connected to the top of the insert blocks 7. A rotating disk 9 is rotatably connected to the top of the connecting plate 5. The side wall of the rotating disk 9 has four equidistant and evenly distributed synchronous grooves 10. The synchronous grooves 10 are arc-shaped. The top of the push rod 8 passes through the synchronous groove 10. The side wall of the hollow gear seat 3 has a second sliding groove 11. The interior of the hollow gear seat 3 has a cavity 12. The rotating disk 9... A toggle lever 13 is fixedly connected to the bottom. The toggle lever 13 passes through the connecting plate 5 and enters the cavity 12. A through groove 14 is opened on the side wall of the second slide groove 11. One end of the toggle lever 13 passes through the through groove 14 and is fixedly connected to a push block 15. The push block 15 is slidably connected in the second slide groove 11. A mounting post 16 is fixedly connected to the bottom of the tooth head 4. The outer wall of the mounting post 16 is adapted to the inner wall of the hollow tooth seat 3. A groove 17 is opened at the bottom of the mounting post 16. Four slots 18 are evenly distributed at equal intervals on the inner wall of the groove 17. When one end of the insert 7 slides outward in the first slide groove 6, it will enter the slot 18.

[0027] By inserting the mounting post 16 of the tooth head 4 into the hollow tooth base 3, the connecting plate 5 and the rotating plate 9 enter the groove 17 at the bottom of the mounting post 16. The rotating plate 9 is driven to rotate by the push block 15 rotating the actuating rod 13. The synchronous groove 10 on the rotating plate 9 drives the push rod 8 to slide in the first sliding groove 6, thereby pushing the insert 7 into the slot 18, thus achieving quick positioning and limiting fixation of the tooth head 4. When disassembling, it is only necessary to push the push block 15 in the opposite direction. During the sliding process, the push block 15 presses the pressure block 21 through the inclined surface structure, pushing the actuating rod 13 to rotate in the opposite direction. The synchronous groove 10 drives the push rod 8 to move in the opposite direction, causing the insert 7 to exit the slot 18, thereby quickly releasing the limit and realizing the disassembly and replacement of the tooth head 4.

[0028] The interconnected structure of connecting plate 5, rotating plate 9, insert block 7, push block 15, limiting groove 22, receiving cavity 19, and pressing block 21 significantly improves the replacement efficiency of tooth head 4. It eliminates the need to replace the entire milling tooth structure, reducing maintenance costs and material waste. At the same time, it simplifies the replacement operation process, reduces downtime, and enhances the continuity and economy of equipment operation. It has good structural reliability and reusability, and has significant engineering application value.

[0029] Further, see attached document. Figure 6 As shown, the hollow tooth base 3 has a receiving cavity 19 on its side wall. A spring 20 is fixedly connected to the inner wall of the receiving cavity 19. A lower pressing block 21 is fixedly connected to the bottom end of the spring 20. The bottom end of the lower pressing block 21 passes into the second sliding groove 11. A limiting groove 22 is opened on the top of the push block 15. When the lower pressing block 21 moves downward, it will enter the limiting groove 22.

[0030] The lower pressure block 21 always has a certain return pressure under the elastic force of the spring 20, which, together with the limiting groove 22 set on the top of the push block 15, realizes the limiting and locking of the push block 15, preventing the push block 15 from loosening during the working process of the tooth head 4, thereby improving the connection stability and safety of the tooth head 4, effectively preventing the tooth head 4 from falling off during high-speed cutting, and improving the reliability and service life of the equipment.

[0031] Further, see attached document. Figure 3 and Figure 5 As shown, when the rotating disk 9 rotates, it will push the push rod 8 to move through the synchronization groove 10. When the push rod 8 moves, it will drive the plug block 7 to slide towards the slot 18 and enter the slot 18.

[0032] When the rotating disk 9 rotates, it can reliably drive multiple push rods 8 to move simultaneously. The push rods 8 further drive the insert block 7 to slide in the first slide groove 6 and accurately insert into the slot 18 in the bottom groove 17 of the mounting post 16, realizing the automatic engagement and quick installation of the tooth head 4. This structure simplifies the tedious process of manually aligning the slot 18 and improves the operating efficiency.

[0033] Further, see attached document. Figure 2 and Figure 6 As shown, the side wall of the lower pressing block 21 near the limiting groove 22 has an inclined surface. The inner wall of the limiting groove 22 and the shape of one end of the lower pressing block 21 are the same. When the push block 15 slides in the direction of the lower pressing block 21, the side wall of the push block 15 will drive the lower pressing block 21 to move upward through the inclined surface of one end of the lower pressing block 21.

[0034] When the push block 15 slides towards the lower pressing block 21, the side wall of the push block 15 can smoothly squeeze the inclined surface of the lower pressing block 21, thereby temporarily giving way to and controlling the compression of the lower pressing block 21, so that the lower pressing block 21 enters the limiting groove 22 and automatically enters the limiting state.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0036] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A milling gear for a trenching machine for diaphragm walls, comprising a fixed frame (1), wherein two rotating gear disks (2) are rotatably connected to the bottom of the fixed frame (1), and a plurality of equally spaced and uniformly distributed hollow tooth seats (3) are fixedly connected to the outer walls of the two rotating gear disks (2), wherein a tooth head (4) for cutting soil and rock is provided at the end of the hollow tooth seat (3) away from the rotating gear disk (2), characterized in that: The hollow tooth holder (3) is provided with a replacement mechanism for replacing the tooth (4) after it wears out.

2. The milling gear for a trenching machine for diaphragm walls according to claim 1, characterized in that, The replacement mechanism includes a connecting plate (5) fixedly connected to the bottom of the inner wall of the hollow gear seat (3). The top of the connecting plate (5) has four first grooves (6) arranged in a cross shape. A plug (7) is slidably connected inside the first groove (6). A push rod (8) is fixedly connected to the top of the plug (7). A rotating disk (9) is rotatably connected to the top of the connecting plate (5). The side wall of the rotating disk (9) has four equidistant and evenly distributed synchronous grooves (10). The synchronous grooves (10) are arc-shaped. The top of the push rod (8) passes into the synchronous groove (10). The side wall of the hollow gear seat (3) has a second groove (11). The interior of the hollow gear seat (3) has a cavity (11). 2) The bottom of the rotating disk (9) is fixedly connected to a toggle rod (13). The toggle rod (13) passes through the connecting disk (5) and enters the cavity (12). The side wall of the second slide groove (11) is provided with a through groove (14). One end of the toggle rod (13) passes through the through groove (14) and is fixedly connected to a push block (15). The push block (15) is slidably connected in the second slide groove (11). The bottom of the tooth head (4) is fixedly connected to a mounting post (16). The bottom of the mounting post (16) is provided with a groove (17). The inner wall of the groove (17) is provided with four equally spaced slots (18). When one end of the insert (7) slides outward in the first slide groove (6), it enters the slot (18).

3. The milling gear for a trenching machine for diaphragm walls according to claim 2, characterized in that, The hollow tooth seat (3) has a receiving cavity (19) on its side wall. A spring (20) is fixedly connected to the inner wall of the receiving cavity (19). A pressing block (21) is fixedly connected to the bottom end of the spring (20). The bottom end of the pressing block (21) is inserted into the second sliding groove (11). A limiting groove (22) is opened on the top of the push block (15). When the pressing block (21) moves downward, it will enter the limiting groove (22).

4. A milling gear for a trenching machine for diaphragm walls according to claim 2, characterized in that, When the rotating disk (9) rotates, it will push the push rod (8) to move through the synchronization groove (10). When the push rod (8) moves, it will drive the plug (7) to slide towards the slot (18) and enter the slot (18).

5. A milling gear for a trenching machine for diaphragm walls according to claim 2, characterized in that, The outer wall of the mounting column (16) and the inner wall of the hollow tooth seat (3) are adapted to each other.

6. A milling gear for a trenching machine for diaphragm walls according to claim 3, characterized in that, The pressure block (21) has an inclined surface on one side wall near the limiting groove (22), and the inner wall of the limiting groove (22) has the same shape as one end of the pressure block (21).

7. A milling gear for a trenching machine for diaphragm walls according to claim 3, characterized in that, When the push block (15) slides in the direction of the downward pressing block (21), the side wall of the push block (15) will drive the downward pressing block (21) to move upward through the inclined surface at one end of the downward pressing block (21).

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