Scraper knife mechanism of wet spraying trolley

Abstract

The invention belongs to the technical field of tunnel construction machinery, and particularly relates to a wet spraying trolley scraper knife mechanism which comprises a rotary flange seat used for being connected with the tail end of a trolley arm frame, a rotary speed reducer and a swing oil cylinder are assembled on the rotary flange seat, the rotary speed reducer is in transmission connection with a scraper knife arm, one end of a variable-amplitude oil cylinder is hinged to the scraper knife arm, and the other end of the variable-amplitude oil cylinder is hinged to the swing oil cylinder. A hob support is hinged to the end, away from the rotary flange base, of the scraper knife arm. The shovel blade mechanism is directly arranged at the front end of the arm frame of the wet spraying trolley, seamless connection can be achieved for cleaning operation after concrete spraying is completed, equipment does not need to be replaced, the construction efficiency is greatly improved, the operation procedure connection time is shortened, and the construction continuity and the overall efficiency are greatly improved; and through the synergistic effect of the swing oil cylinder, the rotary speed reducer and the variable-amplitude oil cylinder, the hob has multiple degrees of freedom, all-directional and small-range fine cleaning operation can be achieved, and the ultra-poor concrete treatment requirements of different positions are met.

Description

Technical Field

[0001] This invention belongs to the field of tunnel construction machinery technology, specifically relating to the wet spraying trolley scraper mechanism. Background Technology

[0002] During tunnel construction, initial support is primarily achieved using a wet shotcrete trolley. This trolley sprays concrete mixed with a quick-setting agent onto the tunnel walls to form initial support. However, the concrete with the quick-setting agent has an extremely short setting time. After spraying, areas with dimensional deviations (such as uneven thickness or irregular contours) must be quickly addressed; otherwise, they will be difficult to clean after hardening, affecting the quality of the support and subsequent construction.

[0003] Currently, the above-mentioned problems are mostly handled manually on construction sites, with workers using hand tools to chisel and repair. This method has obvious drawbacks: first, it is inefficient, as the cleaning speed cannot keep up with the concrete's setting speed; second, it is labor-intensive and the construction environment is harsh; and third, there are risks of height and falling rocks, and the safety of construction workers is insufficient. Summary of the Invention

[0004] The present invention aims to solve the technical problems of low efficiency and poor safety in the existing technology of relying on manual cleaning of concrete. It provides a shovel mechanism integrated into the front end of the boom of a wet spraying trolley, which can seamlessly switch to cleaning mode after spraying operation, so as to realize the mechanized and refined treatment of substandard concrete.

[0005] The specific technical solution adopted by this invention is as follows: The wet spraying trolley shovel mechanism includes a slewing flange seat for connecting to the end of the trolley boom. The slewing flange seat is equipped with a slewing reducer and a swing cylinder. The slewing reducer is connected to the shovel arm in a drive. One end of the luffing cylinder is hinged to the shovel arm. A roller cutter bracket is hinged to the end of the shovel arm away from the slewing flange seat. The upper two ends of the cutter bracket are symmetrically equipped with cutter supports, and the cutter mechanism is rotatably supported on the two cutter supports. A swing motor for driving the cutter mechanism to rotate is provided on the outer side of the two cutter supports. The swing cylinder, rotary reducer, and luffing cylinder work together to adjust the working position and angle of the hobbing mechanism.

[0006] Furthermore, the hobbing mechanism includes a support tube, on which multiple hobbing discs are fixedly arranged at axial intervals.

[0007] Furthermore, multiple cutter bodies are arranged circumferentially on the outer side of the supporting circular tube. The multiple cutter bodies are simultaneously fixedly connected to multiple cutter discs, and the multiple cutter bodies are distributed in a continuous spiral along the central axis of the supporting circular tube.

[0008] Furthermore, both ends of the supporting circular tube are fixedly connected to splined shafts, and the two splined shafts are respectively connected to the output shafts of two swing motors through two splined sleeves. A rotating bearing is provided between the splined shaft and the hob support.

[0009] Furthermore, the hob support and the hob bracket are fixedly connected by bolts.

[0010] Furthermore, the two ends of the swing cylinder are respectively hinged to the rotary flange seat and the shovel arm, and the swing cylinder is used to drive the shovel arm to swing around the output shaft of the rotary reducer.

[0011] Furthermore, the other end of the luffing cylinder is hinged to the cutter holder, and the luffing cylinder is used to adjust the angle between the cutter holder and the scraper arm.

[0012] The technical effects achieved by this invention are as follows: This invention places the shovel mechanism directly on the front end of the wet spraying trolley boom, allowing for seamless transition to cleaning operations after concrete spraying without the need to change equipment. This significantly improves construction efficiency, reduces the time required for connecting work processes, and greatly enhances construction continuity and overall efficiency. Furthermore, through the coordinated action of the swing cylinder, rotary reducer, and luffing cylinder, the roller cutter has multiple degrees of freedom, enabling comprehensive and precise cleaning operations in small areas, and adapting to the needs of handling substandard concrete in different locations.

[0013] This invention uses a motor-driven roller cutter for cleaning, eliminating the need for close-range manual cleaning by construction personnel. This avoids the safety threats posed by complex construction environments and completely replaces high-risk and arduous manual operations, fundamentally ensuring construction safety. At the same time, the cleaning speed and quality are far superior to manual cleaning. Furthermore, the roller cutter is arranged along a spiral line, which effectively reduces resistance during operation, making the operation smoother and less resistant. In addition, the rotating roller cutter mechanism can perform "rolling and scraping" on the concrete surface, resulting in a smoother surface that meets construction requirements. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the hobbing mechanism in this invention; Figure 3 This is a schematic diagram of the connection between the swing motor and the hobbing cutter mechanism in this invention; Figure 4 This is a schematic diagram of the connection between the present invention and the trolley boom.

[0015] The attached diagram lists the components represented by each number as follows: 1. Rotary flange seat; 2. Swing cylinder; 3. Rotary reducer; 4. Shovel arm; 5. Luffing cylinder; 6. Hob support; 7. Hob mechanism; 71. Hob disc; 72. Support tube; 73. Hob body; 74. Spline shaft; 8. Hob support; 9. Swing motor; 10. Spline sleeve. Detailed Implementation

[0016] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0017] like Figure 1-4 As shown, the wet spraying trolley's shovel mechanism includes a slewing flange seat 1 for connecting to the end of the trolley's boom. The slewing flange seat 1 serves as the installation reference for the entire mechanism, achieving a rigid connection with the front end of the wet spraying trolley's boom. A pre-drilled mounting hole is provided in the center of the slewing flange seat 1 for assembling the output shaft of the slewing reducer 3. A sealing ring (made of fluororubber) is provided on the mounting surface to achieve dustproof and waterproof sealing, preventing dust and moisture from entering the internal components. The slewing flange seat 1 is equipped with the slewing reducer 3 and the swing cylinder 2. The slewing reducer is bolted to the slewing flange seat 1 via the flange face. Its output shaft is connected to one end of the shovel arm 4 using a flat key and secured with a shaft end retaining ring and a lock nut to ensure the stability of power transmission. The reducer has a built-in two-way overrunning clutch, which can lock the position and prevent the shovel arm 4 from rotating unexpectedly due to load changes during operation. The slewing reducer 3 drives the entire shovel mechanism to rotate 360° in the horizontal plane relative to the boom. The extension and retraction of the swing cylinder 2 can drive the slewing flange seat 1 and all its components to adjust the pitch angle. The slewing reducer 3 is connected to the shovel arm 4. One end of the luffing cylinder 5 is hinged on the shovel arm 4. The end of the shovel arm 4 away from the slewing flange seat 1 is hinged to the cutter support 6. The extension and retraction of the luffing cylinder 5 can adjust the angle between the cutter support 6 and the shovel arm 4, thereby changing the working tilt angle of the cutter mechanism 7 to adapt to the cleaning needs of different parts such as tunnel arches and sidewalls. The upper two ends of the cutter bracket 6 are symmetrically mounted with cutter supports 8. The cutter mechanism 7 is rotatably supported on the two cutter supports 8. The outer sides of the two cutter supports 8 are provided with swing motors 9 for driving the cutter mechanism 7 to rotate. The swing cylinder 2, the rotary reducer 3, and the luffing cylinder 5 work together to adjust the working position and angle of the roller cutter mechanism 7. Through the coordinated action of the rotary reducer 3, the swing cylinder 2, and the luffing cylinder 5, the roller cutter 7 has the ability to adjust with multiple degrees of freedom in three-dimensional space. It can cover complex parts such as tunnel arches, side walls, corners, and the perimeter of the tunnel face in all directions, with no dead angles in the cleaning range, thus solving the problem of insufficient degrees of freedom in existing mechanical cleaning equipment.

[0018] The hobbing mechanism 7 includes a support tube 72, on which multiple hobbing discs 71 are fixedly arranged axially at intervals.

[0019] Multiple hobbing cutter bodies 73 are arranged circumferentially on the outer side of the supporting circular tube 72. The multiple hobbing cutter bodies 73 are fixedly connected to multiple hobbing cutter discs 71. The multiple hobbing cutter bodies 73 are distributed in a continuous spiral along the central axis of the supporting circular tube 72. The spiral arrangement of the hobbing cutter bodies 73 reduces the working resistance and ensures that the cutting force is evenly distributed.

[0020] Both ends of the supporting circular tube 72 are fixedly connected to splined shafts 74. The two splined shafts 74 are respectively connected to the output shafts of two swing motors 9 through two splined sleeves 10. The stable drive of the swing motors 9 makes the hobbing mechanism 7 rotate smoothly, avoiding chipping and cracking of the concrete surface during the cutting process. A rotating bearing is provided between the splined shaft 74 and the hobbing support 8. The output end of the swing motor 9 is equipped with a splined sleeve 10. The splined sleeve 10 and the splined shaft 74 are clearance-fitted to realize power transmission and ensure that the swing motor 9 drives the hobbing mechanism 7 to rotate smoothly.

[0021] The hob support 8 and the hob bracket 6 are fixedly connected by bolts.

[0022] The two ends of the swing cylinder 2 are respectively hinged to the rotary flange seat 1 and the blade arm 4. The swing cylinder 2 is used to drive the blade arm 4 to swing around the output shaft of the rotary reducer 3.

[0023] The other end of the luffing cylinder 5 is hinged to the cutter support 6. The luffing cylinder 5 is used to adjust the angle between the cutter support 6 and the shovel arm 4. Through its telescopic movement, the extension angle of the shovel arm 4 can be changed, thereby adjusting the working amplitude of the cutter mechanism 7 in the vertical plane.

[0024] The working principle of this invention is as follows: After the wet spraying trolley completes the concrete spraying, the operator controls the trolley to move the boom and the scraper mechanism to the area to be cleaned. First, by operating the rotary reducer 3, the swing cylinder 2, and the luffing cylinder 5, the roller mechanism is precisely positioned and attached to the concrete protrusions or out-of-tolerance surfaces to be treated. Then, the two swing motors 9 are started to drive the support tube 72 and multiple roller bodies 73 to rotate at high speed. The rotating roller bodies 73 contact the concrete and break and peel off the excess concrete through squeezing, shearing, and scraping. Since the roller bodies 73 are arranged in a spiral, they are subjected to continuous and uniform force during rolling, run smoothly, and have low resistance. The cleaned concrete fragments fall off naturally. Through the coordinated movement of multiple degrees of freedom, the out-of-tolerance concrete on the entire working surface can be gradually cleaned and leveled. After the operation is completed, the scraper mechanism can be moved away from the working surface, and the wet spraying trolley can be restored to its spraying operation state.

[0025] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A wet spraying trolley shovel mechanism, comprising a slewing flange seat (1) for connection to the end of the trolley boom, characterized in that: The rotary flange seat (1) is equipped with a rotary reducer (3) and a swing cylinder (2). The rotary reducer (3) is connected to the shovel arm (4) for transmission. One end (5) of the amplitude-changing cylinder is hinged on the shovel arm (4). A hoist bracket (6) is hinged on the end of the shovel arm (4) away from the rotary flange seat (1). The upper two ends of the cutter bracket (6) are symmetrically equipped with cutter supports (8), and the two cutter supports (8) are rotatably supported by a cutter mechanism (7). The outer sides of the two cutter supports (8) are provided with swing motors (9) for driving the cutter mechanism (7) to rotate. The swing cylinder (2), rotary reducer (3), and variable amplitude cylinder (5) work together to adjust the working position and angle of the hobbing mechanism (7).

2. The wet spraying trolley blade mechanism according to claim 1, characterized in that: The hobbing mechanism (7) includes a support tube (72), on which a plurality of hobbing discs (71) are fixedly arranged at axial intervals.

3. The wet spraying trolley blade mechanism according to claim 2, characterized in that: Multiple hobbing cutter bodies (73) are arranged circumferentially on the outer side of the supporting circular tube (72).

4. The wet spraying trolley blade mechanism according to claim 3, characterized in that: Multiple cutter bodies (73) are simultaneously fixedly connected to multiple cutter discs (71), and the multiple cutter bodies (73) are distributed in a continuous spiral along the central axis of the supporting circular tube (72).

5. The wet spraying trolley blade mechanism according to claim 4, characterized in that: Both ends of the supporting round tube (72) are fixedly connected to splined shafts (74).

6. The wet spraying trolley blade mechanism according to claim 5, characterized in that: The two splined shafts (74) are connected to the output shafts of the two oscillating motors (9) respectively through two splined sleeves (10), and a rotating bearing is provided between the splined shafts (74) and the hob support (8).

7. The wet spraying trolley blade mechanism according to claim 6, characterized in that: The hob support (8) and the hob bracket (6) are fixedly connected by bolts.

8. The wet spraying trolley blade mechanism according to claim 1, characterized in that: The two ends of the swing cylinder (2) are respectively hinged to the rotary flange seat (1) and the shovel arm (4). The swing cylinder (2) is used to drive the shovel arm (4) to swing around the output shaft of the rotary reducer (3).

9. The wet spraying trolley blade mechanism according to claim 1, characterized in that: The other end of the variable amplitude cylinder (5) is hinged to the hob support (6).

10. The wet spraying trolley blade mechanism according to claim 9, characterized in that: The variable amplitude cylinder (5) is used to adjust the angle between the roller cutter support (6) and the shovel arm (4).

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