A concrete construction joint chaser

Abstract

The application relates to the technical field of building construction machinery, and particularly discloses a concrete construction joint chiseling machine, which comprises a machine shell, a driving mechanism, a chiseling head and an integrated dust removal system. The dust removal system is composed of a protective cover, a spring compression mechanism, a negative pressure fan and a detachable collection assembly. The protective cover is elastically compressed on a concrete working surface by the spring to form a closed space, and the negative pressure fan draws the dust generated by chiseling into the collection assembly through a collection pipe and is intercepted by a filter core. The scheme can effectively control dust diffusion from the source, the collection efficiency is more than 90%, the working environment is significantly improved while the chiseling effect is guaranteed, the health of the operator is protected, and the scheme has the advantages of convenient maintenance.

Description

Technical Field

[0001] This application relates to the field of construction machinery technology, and in particular to a concrete construction joint roughening machine. Background Technology

[0002] In building construction, concrete pouring often needs to be carried out in stages, which inevitably creates construction joints at the interface between new and old concrete. To ensure the integrity of the structure and the effectiveness of load transfer, the surface of the hardened concrete construction joint must be roughened to remove the surface laitance layer, expose the solid aggregate, and form a rough, clean bonding surface.

[0003] Currently, various concrete roughening devices exist on the market. According to Chinese patent CN219732797U, a handheld concrete construction joint roughening machine uses a motor-driven shaft to rotate the hammer head at high speed, thus roughening the concrete surface. However, this type of equipment has significant drawbacks in practical use: the large amount of dust generated during roughening cannot be effectively controlled and directly permeates the working environment. This not only seriously pollutes the construction site and surrounding area, but more importantly, it poses a serious threat to the respiratory health of operators. Furthermore, the permeated dust reduces visibility, affects operational accuracy, and requires specialized joint cleaning after roughening, increasing construction procedures and time costs.

[0004] While some existing technologies attempt to address the dust problem, most suffer from complex structures, low collection efficiency, or inconvenient maintenance. For example, some devices use external dust collection units, resulting in bulky equipment that is difficult to move; others have collection devices that are difficult to disassemble and cumbersome to clean, affecting construction efficiency. Therefore, there is an urgent need in this field for a concrete construction joint roughening machine that can fundamentally solve the dust collection problem while ensuring ease of operation and maintenance. Utility Model Content

[0005] This application provides a concrete construction joint roughening machine. By installing a spring-loaded protective cover around the roughening head, it forms a locally enclosed space that fits tightly against the working surface. A negative pressure fan draws the generated dust through a collection pipe into a quickly detachable collection assembly, where it is efficiently intercepted by a filter element. This design effectively collects over 90% of the dust at the source, significantly improving the working environment and completely solving the dust control problem while achieving efficient roughening.

[0006] This application provides a concrete construction joint roughening machine, including a machine housing, wherein a drive mechanism and a negative pressure fan are provided inside the machine housing;

[0007] The output end of the drive mechanism is connected to a transmission shaft, and a chisel head is installed at the end of the transmission shaft.

[0008] A protective cover is slidably fitted on the drive shaft, and an elastic clamping mechanism is provided between the protective cover and the machine housing;

[0009] A collection assembly is detachably connected to the housing, and the collection assembly is connected to the protective cover via a collection pipe;

[0010] The negative pressure fan, protective cover, collection pipe and collection components constitute the dust removal system.

[0011] Furthermore, the elastic clamping mechanism is a spring sleeved on the drive shaft, with one end of the spring connected to the housing and the other end connected to the protective cover.

[0012] Furthermore, the collection assembly includes a collection shell, inside which a filter element is provided, and the collection shell is connected to the housing in a sealed manner through a connection interface.

[0013] Furthermore, the collection shell is provided with a display window and a latching groove, and the collection shell is detachably connected to the mounting rail at the bottom of the housing via a latching plate.

[0014] Furthermore, the drive mechanism includes a drive motor and a reducer, wherein the drive motor is connected to the transmission shaft via the reducer.

[0015] Furthermore, a transmission sleeve is fixedly connected to the left side of the housing, and the transmission shaft is rotatably connected to the transmission sleeve through a bearing. A chisel head is installed at the end of the transmission shaft through a chuck.

[0016] Furthermore, the housing is provided with a grip and a hand grip bar, and a control switch is installed on the grip.

[0017] Furthermore, the bottom of the housing is provided with an exhaust grille, and a fixing plate is provided inside to separate the installation space.

[0018] Furthermore, a cover plate is installed on the outer surface of the housing by screws, and the cover plate has heat dissipation holes.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The technical solution provided in this application has at least the following technical effects or advantages:

[0021] 1. The closed dust removal system, consisting of a negative pressure fan, protective cover, collection pipe and filter element, can efficiently collect dust from the source during the chipping operation, with a dust removal efficiency of over 90%, significantly reducing the dust concentration in the work area, fundamentally improving the construction environment and effectively protecting the respiratory health of operators.

[0022] 2. The spring-supported protective cover structure automatically adapts to uneven concrete surfaces, ensuring constant close contact between the cover and the work surface to form an effective sealed space, preventing dust escape and guaranteeing continuous and stable negative pressure dust collection. The collection component features a rail-mounted quick-release design, allowing for tool-free disassembly and installation. A transparent window facilitates timely cleaning, significantly simplifying maintenance and improving construction efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the installation structure of the chuck and the chisel head in this application;

[0025] Figure 3 This is a schematic diagram of the front section structure of the casing in this application;

[0026] Figure 4 This is a schematic diagram of the connection structure between the collection components and the protective cover in this application;

[0027] In the diagram: 1. Housing; 2. Cover plate; 3. Heat dissipation holes; 4. Hand grip; 5. Spring; 6. Protective cover; 7. Rail; 8. Collection assembly; 801. Collection shell; 802. Connection interface; 803. Clamping plate; 804. Display window; 805. Clip groove; 806. Collection tube; 9. Control switch; 10. Handle; 11. Chisel head; 12. Clamp; 13. Transmission sleeve; 14. Exhaust grille; 15. Drive shaft; 16. Reducer; 17. Drive motor; 18. Filter element; 19. Negative pressure fan; 20. Fixing plate. Detailed Implementation

[0028] This application provides a concrete construction joint roughening machine. By installing a spring-loaded protective cover around the roughening head, it forms a locally enclosed space that closely adheres to the working surface. A negative pressure fan draws the generated dust through a collection pipe into a quickly detachable collection assembly, where it is efficiently intercepted by a filter element. This design effectively collects over 90% of the dust at the source, significantly improving the working environment and completely solving the dust control problem while achieving efficient roughening. To better understand the above technical solution, a detailed description of the technical solution will be provided below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1:

[0030] Please see Figures 1 to 4 This embodiment provides a concrete construction joint roughening machine, the core innovation of which is the integration of a high-efficiency dust removal system, which can effectively collect the dust generated during the roughening operation.

[0031] The chipping machine includes a housing 1 made of high-strength engineering plastic, internally divided into a motor compartment and a fan compartment by a fixing plate 20. A drive motor 17, preferably an AC variable frequency motor with a rated power of 1500W, is installed inside the motor compartment and is connected to the right end of the drive shaft 15 via a reducer 16. The reducer 16 has a reduction ratio of 1:5, which converts the high-speed rotation of the motor into the working speed required by the chipping head 11.

[0032] The drive shaft 15 is supported within the drive sleeve 13 by two deep groove ball bearings, and the drive sleeve 13 is fixedly connected to the left side of the housing 1. A chuck 12 is connected to the left end of the drive shaft 15 via a Morse taper. The chuck 12 has a quick-clamping structure inside, allowing for easy installation and replacement of different sizes of chisel heads 11. The working end of the chisel head 11 has multiple carbide chisel teeth with a tooth height of 8mm and a tooth spacing of 15mm. This design ensures chiseling effect while controlling dust generation.

[0033] The protective cover 6 is slidably sleeved on the outside of the drive shaft 15, with its inner diameter being 2mm larger than the outer diameter of the drive shaft 15, ensuring smooth sliding while avoiding excessive clearance. The spring 5 is sleeved on the drive shaft 15, with its right end abutting against the left side of the housing 1 and its left end contacting the right end face of the protective cover 6. The spring 5 has a stiffness coefficient of 8N / mm, a free length of 120mm, and a working length of 80mm, providing sufficient clamping force for the protective cover 6 while also adapting to the unevenness of the concrete surface.

[0034] The collecting component 8 is installed at the bottom of the housing 1 via a snap-fit ​​connection. Specifically, two parallel locking rails 7 are fixed to the bottom surface of the housing 1, and the cross-section of the locking rails 7 is dovetail-shaped. Two matching locking plates 803 are fixed to the upper surface of the collecting shell 801, and quick installation is achieved through a push-in connection. The collecting shell 801 is made of transparent polycarbonate material, and a scale display window 804 is provided on the front for easy observation of dust accumulation. The collecting shell 801 has locking grooves 805 on both the front and back for easy disassembly.

[0035] The right side of the collection shell 801 and the left side of the casing 1 are respectively provided with connection interfaces 802, and the two interfaces are airtightly connected by sealing rings. Inside the collection shell 801 is a filter element 18, which uses high-efficiency materials and has a filtration accuracy of 0.3 microns, effectively intercepting cement dust. The left side of the collection shell 801 is connected to the collection pipe 806 via a quick connector, and the other end of the collection pipe 806 is connected to the protective cover 6.

[0036] A negative pressure fan 19 is installed in the fan compartment inside the casing 1. This fan adopts a centrifugal structure, with an air volume of 25 m³ / h and a static pressure of 1200 Pa, which can generate sufficient negative pressure for dust collection. An exhaust grille 14 is provided at the bottom of the casing 1 to ensure unobstructed airflow.

[0037] Example 2:

[0038] This embodiment further optimizes the operational comfort and heat dissipation performance based on Embodiment 1.

[0039] A handle 10 is bolted to the right side of the casing 1. The surface of the handle 10 is covered with a non-slip rubber layer, and its contour is ergonomically designed for comfortable grip. A control switch 9 is embedded in the inner wall of the handle 10. This switch is waterproof and has two functions: start and stop.

[0040] A handgrip 4 is welded to the back of the housing 1. The handgrip has a diameter of 40mm and its surface is knurled to increase friction. During operation, the operator can hold the handle 10 with one hand to control the switch and hold the handgrip 4 with the other hand to stabilize the device, thus achieving precise operation.

[0041] A cover plate 2 is screwed onto the outer surface of the casing 1. The cover plate 2 is made of aluminum alloy, which ensures both strength and facilitates heat dissipation. Multiple heat dissipation holes 3 are evenly distributed on the outer surface of the cover plate 2, with a hole diameter of 8mm and a hole spacing of 15mm, forming an effective heat dissipation airflow. A sealing gasket is provided between the cover plate 2 and the casing 1 to prevent dust from entering the machine.

[0042] Working principle and process:

[0043] When using the equipment, first install the appropriate chisel head 11 into the chuck 12 and lock it. Ensure that the collection component 8 is firmly installed in place through the cooperation of the clamping plate 803 and the clamping rail 7. At this time, the connection interface 802 between the collection shell 801 and the housing 1 automatically connects to form a sealed air duct.

[0044] The operator holds the handle 10 and the hand grip 4 with both hands respectively, and moves the equipment to the construction joint. The equipment is started via the control switch 9 on the handle 10, and the drive motor 17 begins to work, driving the chisel head 11 to rotate at 2000 rpm through the reducer 16 and drive shaft 15. Simultaneously, the negative pressure fan 19 starts, creating a negative pressure airflow within the dust removal system.

[0045] During the chiseling operation, the protective cover 6 automatically presses against the concrete surface under the action of spring 5, forming a relatively closed working chamber. The dust generated during chiseling will not spread under the constraint of the protective cover 6, but will instead enter the collection shell 801 through the collection pipe 806 with the negative pressure airflow. When the dusty air flows through the filter element 18, the dust is effectively intercepted, and the clean air is discharged from the exhaust grille 14 through the negative pressure fan 19.

[0046] When the display window 804 shows that the dust collection level has reached the warning line, the operator can remove the entire collection assembly 8 through the latch 805 for cleaning. The filter element 18 can also be easily removed for cleaning or replacement, ensuring the continuous and efficient operation of the dust removal system.

[0047] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A concrete construction joint roughening machine, comprising a housing (1), characterized in that: The housing (1) is equipped with a drive mechanism and a negative pressure fan (19). The output end of the drive mechanism is connected to a drive shaft (15), and a chisel head (11) is installed at the end of the drive shaft (15). A protective cover (6) is slidably sleeved on the drive shaft (15), and an elastic pressing mechanism is provided between the protective cover (6) and the housing (1); A collection assembly (8) is detachably connected to the housing (1), and the collection assembly (8) is connected to the protective cover (6) through a collection pipe (806); The negative pressure fan (19), protective cover (6), collection pipe (806) and collection assembly (8) constitute a dust removal system.

2. The concrete construction joint roughening machine according to claim 1, characterized in that: The elastic clamping mechanism is a spring (5) sleeved on the transmission shaft (15). One end of the spring (5) is connected to the housing (1), and the other end is connected to the protective cover (6).

3. The concrete construction joint roughening machine according to claim 1, characterized in that: The collection component (8) includes a collection shell (801), a filter element (18) is provided inside the collection shell (801), and the collection shell (801) is connected to the housing (1) in a sealed manner through a connection interface (802).

4. The concrete construction joint roughening machine according to claim 3, characterized in that: The collection shell (801) is provided with a display window (804) and a buckle groove (805). The collection shell (801) is detachably connected to the bottom rail (7) of the housing (1) via a retaining plate (803).

5. The concrete construction joint roughening machine according to claim 1, characterized in that: The drive mechanism includes a drive motor (17) and a reducer (16), and the drive motor (17) is connected to the transmission shaft (15) through the reducer (16).

6. The concrete construction joint roughening machine according to claim 1, characterized in that: A transmission sleeve (13) is fixedly connected to the left side of the housing (1). The transmission shaft (15) is rotatably connected to the transmission sleeve (13) through a bearing. The end of the transmission shaft (15) is fitted with a chisel head (11) through a chuck (12).

7. The concrete construction joint roughening machine according to claim 1, characterized in that: The housing (1) is provided with a handle (10) and a hand grip (4), and a control switch (9) is installed on the handle (10).

8. The concrete construction joint roughening machine according to claim 1, characterized in that: The bottom of the housing (1) is provided with an exhaust grille (14), and a fixing plate (20) is provided inside to separate the installation space.

9. The concrete construction joint roughening machine according to claim 1, characterized in that: The outer surface of the housing (1) is fitted with a cover plate (2) by screws, and the cover plate (2) has heat dissipation holes (3).

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