A cutter head device for a concrete milling machine

Abstract

The utility model relates to a kind of cutter head devices of mixed coagulation milling machine, including milling head, and it is realized the quick mechanical connection with the bucket rod end of excavator by quick-change connector on excavator;The milling head includes base body and the cutter shaft and the hydraulic motor connected with cutter shaft end portion being arranged in base body, and hydraulic motor is connected with base body, multiple storage grooves are equidistantly opened on the cutter shaft along the circumferential direction, and cutter seat is arranged in storage groove, multiple cutters are arranged on the cutter seat along rectangular array, the both ends of the cutter seat are fixedly connected with connecting block, and fixed mechanism is arranged on the connecting block.Compared with the mode of existing welding or directly fixed cutter, the cutter head device in the utility model is significantly improved in cutter seat fixing and replacement;Single cutter seat can be quickly disassembled and assembled, and the operation is simple, the maintenance efficiency is improved several times, and the operation safety and the effect of facilitating cutter replacement are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower engineering technology, specifically to a cutter head device for a concrete milling machine. Background Technology

[0002] In the field of water conservancy and hydropower engineering, most underwater structural concrete suffers from severe surface carbonation due to the constantly changing and varied environments they are exposed to. While this carbonation does not affect the overall structural safety, it significantly reduces the concrete's service life. If left unchecked, the structural safety hazards will become increasingly serious. Therefore, carbonation treatment of hydraulic concrete plays a crucial role in the reinforcement of water conservancy and hydropower projects.

[0003] In the field of construction engineering, using excavators equipped with specialized milling devices to mill, roughen, and break up concrete structures (such as walls, floors, and channel surfaces) is a highly efficient processing method. Currently, the cutter heads of such milling machines mostly use the traditional method of directly welding the cutters to the cutter head base or rigidly fixing the cutter holder with bolts. As core consumable parts, the cutters wear out rapidly when impacting the concrete surface. Replacing cutters with traditional welded structures requires on-site cutting and welding, which is a complex process and the high temperatures can damage the cutter head itself. This turns what should be a quick cutter change into a lengthy downtime for maintenance, severely restricting construction efficiency and failing to meet the urgent needs of modern engineering for continuous and efficient operation. Based on this, the applicant designed a cutter head device for a concrete milling machine to improve the efficiency of cutter head replacement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cutter head device for a concrete milling machine, which addresses the above-mentioned shortcomings. By modifying part of the excavator structure and adding a special cutter head, the hydraulic system drives the hydraulic motor to make the cutter head rotate at high speed to cut the concrete surface, thereby achieving the effect of removing the carbonized layer on the concrete surface. By quickly replacing the cutters on the cutter head, it has broad application value.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: A cutter head device for a concrete milling machine includes a milling head, which is quickly mechanically connected to the end of the excavator's stick via a quick-connect coupling on the excavator. The milling head is connected to the hydraulic system of the excavator's main unit via a high-pressure oil pipe, providing power to a hydraulic motor integrated inside the milling head, thereby driving the cutter head to perform high-speed rotational cutting. The milling head includes a base, a cutter shaft disposed inside the base, and a hydraulic motor connected to the end of the cutter shaft. The hydraulic motor is connected to the base. The cutter shaft has multiple storage slots evenly spaced along the circumferential direction, and a cutter holder is disposed in each of the storage slots. Multiple cutters are disposed in a rectangular array on the cutter holder. Connecting blocks are fixedly connected to both ends of the cutter holder, and fixing mechanisms are disposed on the connecting blocks.

[0006] The fixing mechanism includes a fixing bolt connected to the connecting block, a pressure plate is provided on the fixing bolt, and wing plates are fixedly installed on both sides of the pressure plate. Locking bolts for fixing the cutter shaft are provided on the wing plates.

[0007] Preferably, both sides of the cutter shaft are provided with grooves adapted to the fixing mechanism, and the grooves are connected to the storage groove on the cutter shaft.

[0008] Preferably, both the connecting block and the groove are provided with screw holes that are compatible with the fixing bolts.

[0009] Preferably, the pressure plate is adapted to the groove, and a rubber layer is provided between the pressure plate and the fixing bolt.

[0010] Preferably, the cutter shaft has a slot adapted to the wing plate, and both the wing plate and the slot have screw holes adapted to the locking bolts.

[0011] Preferably, six tool holders are arranged in a circumferential array along the axial direction on the tool shaft.

[0012] Preferably, the cutter head is further provided with a moving mechanism to facilitate the smooth movement of the cutter head and a dust removal mechanism to reduce dust in the processing area on both sides. The moving mechanism includes a bracket fixed on the cutter head and rollers set on the bracket. The rollers in the moving mechanism facilitate the movement of the cutter head and control the depth of the cutter head. The dust removal mechanism includes a water pipe and a nozzle connected to the water pipe. The nozzle facilitates the cooling and dust removal of the processing area and prevents dust from affecting the surrounding environment.

[0013] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages: Compared to existing methods of welding or directly fixing tools, the tool holder device in this invention significantly improves tool holder fixing and replacement. Traditional methods require on-site cutting, welding, or treatment of rusted bolts when replacing a single tool or assembly, which is time-consuming and labor-intensive. This invention adopts a modular tool holder and a double locking mechanism, which allows for quick disassembly and assembly of a single tool holder by loosening only a few locking and fixing bolts during replacement. The operation is simple, improving maintenance efficiency several times over and greatly enhancing operational safety and facilitating tool replacement.

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a perspective view of the cutter head device in this application; Figure 2 This is a bottom view of the cutter head device in this application; Figure 3 This is a side sectional view of the cutter head device in this application; Figure 4 This is a side sectional view of the cutter shaft of the cutter head device in this application; Figure 5 for Figure 4 A magnified structural diagram of A in the middle; Figure 6 This is a top view of the cutter head device in this application; Figure 7 This is a front view of the cutter head device in this application; Figure 8 This is a side view of the cutter head device in this application.

[0016] The attached diagram lists the components represented by each number as follows: 1. Milling head; 2. Base; 3. Cutter shaft; 4. Hydraulic motor; 5. Storage slot; 6. Tool holder; 7. Cutting tool; 8. Connecting block; 9. Fixing bolt; 10. Pressure plate; 11. Wing plate; 12. Locking bolt; 13. Groove; 14. Rubber layer. Detailed Implementation

[0017] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise" and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Example 1 Please see Figure 1-8 This utility model provides a technical solution: a cutter head device for a concrete milling machine, including a milling head 1, which is a hydraulic milling head or a milling excavator head, and is quickly mechanically connected to the end of the excavator's stick via a quick-connect coupling on the excavator; the milling head 1 is connected to the hydraulic system of the excavator's main unit via a high-pressure oil pipe, providing power to the hydraulic motor 4 integrated inside the milling head 1, thereby driving the cutter head to perform high-speed rotational cutting; the milling head 1 includes a base 2 and a cutter shaft 3 disposed inside the base 2 and a hydraulic motor 4 connected to the end of the cutter shaft 3, and the hydraulic motor 4 is connected to the base 2; the cutter shaft 3 has multiple storage slots 5 evenly spaced along the circumferential direction, and a cutter holder 6 is disposed in the storage slot 5; multiple cutters 7 are disposed along a rectangular array on the cutter holder 6; both ends of the cutter holder 6 are fixedly connected to connecting blocks 8, and the connecting blocks 8 are provided with fixing mechanisms.

[0020] The fixing mechanism includes a fixing bolt 9 connected to the connecting block 8. A pressure plate 10 is provided on the fixing bolt 9. Wing plates 11 are fixedly installed on both sides of the pressure plate 10. Locking bolts 12 that are fixed to the cutter shaft 3 are provided on the wing plates 11.

[0021] Furthermore, both sides of the cutter shaft 3 are provided with grooves 13 that are adapted to the fixing mechanism, and the grooves 13 are connected to the receiving grooves 5 on the cutter shaft 3. The connecting block 8 and the grooves 13 are provided with screw holes that are adapted to the fixing bolts 9. The pressure plate 10 is adapted to the grooves 13, and a rubber layer 14 is provided between the pressure plate 10 and the fixing bolts 9. The cutter shaft 3 is provided with a slot that is adapted to the wing plate 11, and the wing plate 11 and the slot are provided with screw holes that are adapted to the locking bolts 12. Six cutter holders 6 are arranged in a circumferential array along the axial direction of the cutter shaft 3.

[0022] The cutter head is also equipped with a moving mechanism to facilitate its smooth movement and a dust removal mechanism to reduce dust in the processing area on both sides. The moving mechanism includes a bracket fixed on the cutter head and rollers mounted on the bracket. The rollers in the moving mechanism facilitate the movement of the cutter head and control the depth of the cutter head. The dust removal mechanism includes a water pipe and a nozzle connected to the water pipe. The nozzle facilitates cooling and dust removal of the processing area, preventing dust from affecting the surrounding environment.

[0023] The working principle is as follows: The hydraulic system of the excavator drives the hydraulic motor 4 inside the milling head 1, which drives the cutter shaft 3 to rotate at high speed; the storage groove 5 on the cutter shaft 3 is equipped with modular cutter holders 6. Each cutter holder 6 is embedded into the grooves 13 on both sides of the cutter shaft 3 through the connecting blocks 8 at both ends, and is vertically fixed by the clamping plate 10 pressed by the fixing bolts 9. At the same time, the wing plates 11 on both sides of the clamping plate 10 are laterally locked by the locking bolts 12, forming a double locking. This structure not only ensures the stability of the cutter 7 during heavy milling, but also makes the replacement of the cutter holder 6 only require the removal of a few bolts, achieving a balance between efficient operation and convenient maintenance.

[0024] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A cutter head device for a concrete milling machine, characterized in that: The device includes a milling head (1), which is quickly mechanically connected to the end of the excavator's stick via a quick-connect coupling on the excavator. The milling head (1) includes a base (2), a cutter shaft (3) disposed inside the base (2), and a hydraulic motor (4) connected to the end of the cutter shaft (3). The hydraulic motor (4) is connected to the base (2). The cutter shaft (3) has multiple storage slots (5) evenly spaced along the circumferential direction. A cutter holder (6) is disposed in the storage slot (5). Multiple cutters (7) are disposed along a rectangular array on the cutter holder (6). Both ends of the cutter holder (6) are fixedly connected to connecting blocks (8). A fixing mechanism is disposed on the connecting blocks (8). The fixing mechanism includes a fixing bolt (9) connected to the connecting block (8), a pressure plate (10) is provided on the fixing bolt (9), and wing plates (11) are fixedly installed on both sides of the pressure plate (10). Locking bolts (12) that are fixed to the cutter shaft (3) are provided on the wing plates (11).

2. The cutter head device of a concrete milling machine according to claim 1, characterized in that: Both sides of the cutter shaft (3) are provided with grooves (13) that are adapted to the fixing mechanism, and the grooves (13) are connected to the storage grooves (5) on the cutter shaft (3).

3. The cutter head device of a concrete milling machine according to claim 2, characterized in that: Both the connecting block (8) and the groove (13) are provided with screw holes that are compatible with the fixing bolts (9).

4. The cutter head device of a concrete milling machine according to claim 2, characterized in that: The pressure plate (10) is adapted to the groove (13), and a rubber layer (14) is provided between the pressure plate (10) and the fixing bolt (9).

5. The cutter head device of a concrete milling machine according to claim 1, characterized in that: The cutter shaft (3) is provided with a slot that matches the wing plate (11), and both the wing plate (11) and the slot are provided with screw holes that match the locking bolts (12).

6. The cutter head device of a concrete milling machine according to claim 1, characterized in that: The cutter shaft (3) has six cutter holders (6) arranged in a circular array along its axial direction.

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