Hand-push type concrete bush hammer

Abstract

The utility model provides a hand-push type concrete bush hammer which comprises a main machine body and a photosensitive positioning plate, an infrared emission instrument is arranged on the main machine body, the photosensitive positioning plate is used for being arranged on the ground to be subjected to bush hammer, the photosensitive positioning plate and the infrared emission instrument are arranged in a front-back corresponding mode, and a plurality of positioning strips are arranged on the photosensitive positioning plate. The plurality of positioning strips are sequentially arranged from top to bottom, and the photosensitive positioning plate is used for receiving infrared rays emitted by the infrared emission instrument and displaying the height of the infrared emission instrument through the positioning strips. According to the hand-push type concrete bush hammer provided by the utility model, the infrared emission instrument emits the infrared light beam, so that the infrared light beam is aligned with a certain positioning strip; and after the scabbling operation is started, the infrared light beam moves downwards along with the increase of the scabbling depth, and the scabbling operation can be stopped until the infrared light beam is aligned with the set positioning strip. According to the structure, the hand-push type concrete scabbler can quickly and accurately position the scabbling depth, the uniform scabbling effect is guaranteed, and the construction quality can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete engineering, and in particular relates to a hand-propelled concrete roughening machine. Background Art

[0002] A roughing machine is a tool similar to a "chopping axe" that is used to process the completed main structure surface so that the construction surfaces of the two construction stages can be firmly bonded. In cast-in-place concrete structures, after the cast-in-place slab is poured, it must be roughened before the next layer is poured, so that the concrete can be firmly bonded. Therefore, the roughing machine is also called a concrete roughing machine. Concrete roughing machines are widely used in the fields of highway, railway, bridge, tunnel, water conservancy and hydropower reinforcement, building reinforcement, decoration, municipal road and bridge repair and reinforcement, airport, parking lot and other roughing reinforcement projects.

[0003] In the prior art, when a concrete chiseling machine is performing a chiseling operation on a concrete surface, it is necessary to rely on the operator's experience and determine the chiseling depth through manual visual inspection. Even if positioning marks are drawn on the chiseled surface, the above method is prone to positioning errors, resulting in uneven chiseling depth and affecting the construction quality. Utility Model Content

[0004] The embodiment of the utility model provides a hand-propelled concrete roughening machine, which can quickly and accurately locate the roughening depth, ensure a uniform roughening effect, and help improve the construction quality.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a hand-push concrete roughening machine, including a main body and a photosensitive positioning plate, a plurality of roughening heads are arranged at the bottom of the main body, and walking wheels and a hand push rod are respectively arranged on the rear side of the main body, an infrared transmitter is arranged on the main body, and the emission direction of the infrared transmitter is parallel to the walking direction of the main body, the photosensitive positioning plate is used to be set on the ground to be roughened, and the photosensitive positioning plate and the infrared transmitter are arranged in front and behind, and a plurality of horizontally extending positioning strips are provided on the side of the photosensitive positioning plate facing the infrared transmitter, and the plurality of positioning strips are arranged in sequence from top to bottom, and the photosensitive positioning plate is used to receive infrared rays emitted by the infrared transmitter and display the height of the infrared transmitter through the positioning strips.

[0006] As another embodiment of the utility model, the positioning strip is covered with a photosensitive layer, and the photosensitive layers on the positioning strips at different heights are made of different photosensitive materials.

[0007] As another embodiment of the utility model, the bottom of the photosensitive positioning plate is connected to a support rod extending downward, and the bottom end of the support rod is connected to a chassis for supporting on the ground.

[0008] As another embodiment of the utility model, the support rod includes an outer sleeve connected to the chassis and a connecting rod slidably connected to the outer sleeve, the photosensitive positioning plate is connected to the upper end of the connecting rod, and a locking screw is provided between the outer sleeve and the connecting rod. The inner end of the locking screw passes through the peripheral wall of the outer sleeve and is used to abut against the outer periphery of the connecting rod.

[0009] As another embodiment of the utility model, two groups of infrared emitters and photosensitive positioning plates are respectively provided, and the two infrared emitters are respectively arranged close to the two side walls of the main body.

[0010] As another embodiment of the utility model, the infrared transmitter is connected to the main body through a clamping seat, the clamping seat includes a lower supporting seat connected to the top surface of the main body and an upper clamping block hinged above the lower supporting seat, the lower supporting seat is provided with a lower half groove opening upward and passing through along the moving direction of the main body, the upper clamping block is provided with an upper half groove opening downward and passing through along the moving direction of the main body, the upper half groove and the lower half groove are arranged correspondingly up and down and can be enclosed to form an installation hole for accommodating the infrared transmitter.

[0011] As another embodiment of the utility model, an axially extending bubble level is provided on the peripheral wall of the infrared transmitter, and an escape groove penetrating from top to bottom for allowing the bubble level to be exposed is provided on the upper clamping block.

[0012] As another embodiment of the utility model, a lighting lamp is connected to the front side wall of the main body, and a shock-absorbing pad is provided between the lighting lamp and the main body.

[0013] As another embodiment of the utility model, a dust box is provided in the main body, and a dust suction port is provided at the bottom of the main body which passes through the bottom wall of the main body and is connected to the dust box. A negative pressure pipeline connected to the dust box is connected to the main body.

[0014] As another embodiment of the utility model, the dust suction port extends perpendicular to the moving direction of the main body, and two dust suction ports are provided, and the two dust suction ports are arranged at intervals along the moving direction of the main body.

[0015] The hand-push concrete roughening machine provided by the utility model has the following beneficial effects: compared with the prior art, the hand-push concrete roughening machine of the utility model places a photosensitive positioning plate provided with a plurality of positioning strips on the ground to be roughened in front of the main body, and keeps a certain distance from the main body, and emits an infrared beam in the direction of travel of the main body through the infrared transmitter on the main body, so that the infrared beam is aligned with a certain positioning strip (which can be defined as the center line position) on the photosensitive positioning plate; after the roughening operation starts, the infrared beam will move downward as the roughening depth increases until it is aligned with the set positioning strip, indicating that the roughening depth has reached the predetermined depth, and the roughening operation can be stopped. The above structure enables the hand-push concrete roughening machine to quickly and accurately locate the roughening depth, ensures a uniform roughening effect, and helps to improve the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of a hand-pushed concrete chiseling machine provided in an embodiment of the utility model;

[0018] Figure 2 A schematic diagram of the structure of a hand-pushed concrete chiseling machine (excluding the photosensitive positioning plate) provided in an embodiment of the utility model;

[0019] Figure 3 For the utility model embodiment Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0020] Figure 4 A schematic diagram of the structure of a photosensitive positioning plate provided in an embodiment of the utility model;

[0021] Figure 5 The present invention is a schematic diagram of the structure of a hand-propelled concrete chiseling machine (excluding the photosensitive positioning plate) provided in an embodiment of the utility model when viewed from above.

[0022] Among them, the reference numerals in the figure are:

[0023] 1. Infrared transmitter; 11. Bubble level; 2. Photosensitive positioning plate; 21. Positioning strip; 22. Support rod; 221. Outer sleeve; 222. Connecting rod; 223. Locking screw; 23. Chassis; 3. Clamping seat; 31. Lower support seat; 311. Lower half groove; 32. Upper clamping block; 321. Upper half groove; 322. Avoidance groove; 4. Lighting lamp; 41. Shock-absorbing pad; 5. Dust suction port; 6. Negative pressure pipeline; 10. Main body; 20. Chiseling head; 30. Traveling wheel; 40. Push rod. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on another element or indirectly on another element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention 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 cannot be understood as a limitation of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meanings of "multiple" and "several" are two or more, unless otherwise clearly and specifically defined.

[0026] Please also read Figures 1 to 5 Now, a hand-push concrete roughening machine provided by the utility model is described. The hand-push concrete roughening machine includes a main body 10 and a photosensitive positioning plate 2. A plurality of roughening heads 20 are provided at the bottom of the main body 10. Travel wheels 30 and a hand push rod 40 are provided at the rear side of the main body 10. An infrared transmitter 1 is provided on the main body 10. The emission direction of the infrared transmitter 1 is parallel to the travel direction of the main body 10. The photosensitive positioning plate 2 is used to be set on the ground to be roughened, and the photosensitive positioning plate 2 and the infrared transmitter 1 are arranged front and back correspondingly. A plurality of horizontally extending positioning bars 21 are provided on the side of the photosensitive positioning plate 2 facing the infrared transmitter 1. The plurality of positioning bars 21 are arranged in sequence from top to bottom. The photosensitive positioning plate 2 is used to receive infrared rays emitted by the infrared transmitter 1 and display the height of the infrared transmitter 1 through the positioning bars 21.

[0027] Compared with the prior art, the hand-pushed concrete roughening machine provided in this embodiment has a photosensitive positioning plate 2 provided with a plurality of positioning strips 21 placed on the ground to be roughened in front of the main body 10 and kept at a certain distance from the main body 10, and an infrared light beam is emitted in the direction of travel of the main body 10 by the infrared transmitter 1 on the main body 10, so that the infrared light beam is aligned with a certain positioning strip 21 (which can be defined as the center line position) on the photosensitive positioning plate 2; after the roughening operation starts, the infrared light beam will move downward as the roughening depth increases until it is aligned with the set positioning strip 21, indicating that the roughening depth has reached the predetermined depth, and the roughening operation can be stopped. The above structure enables the hand-pushed concrete roughening machine to quickly and accurately locate the roughening depth, ensures a uniform roughening effect, and helps to improve the construction quality.

[0028] In this embodiment, a storage battery is provided inside the main body 10 to provide power for the infrared transmitter 1. At the same time, in order to facilitate the operation of the operator, the switch button of the infrared transmitter 1 can be set on the push rod 40. The infrared beam emitted by the infrared transmitter 1 is irradiated onto the photosensitive positioning plate 2. Due to the photosensitive characteristics of the photosensitive positioning plate 2, the corresponding positioning bar 21 can be lit to clearly display the corresponding height of the infrared transmitter 1.

[0029] During the actual chiseling operation, the infrared transmitter 1 is always turned on, and the operator observes the projection height of the infrared beam in real time, that is, the height of the corresponding positioning bar 21. When the positioning bar 21 corresponding to the infrared beam is far from the set positioning bar 21, the push rod 40 can be slowly pushed so that the chiseling head 20 has sufficient time to chisel and ensure the chiseling depth; when the positioning bar 21 corresponding to the infrared beam is close to the set positioning bar 21, the push rod 40 can be quickly pushed so that the chiseling head 20 chisels quickly and shallowly to avoid the chiseling depth exceeding the set value.

[0030] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 1 and Figure 4 The positioning strip 21 is covered with a photosensitive layer, and the photosensitive layers on the positioning strips 21 at different heights are made of different photosensitive materials.

[0031] In this embodiment, a photosensitive layer is formed by applying a photosensitive material on the positioning bar 21. When the infrared light beam emitted by the infrared transmitter 1 is projected onto the photosensitive layer, the photosensitive layer can show a bright color. Specifically, size interval numbers can be marked on the positioning bar 21 at different heights to facilitate the operator to identify the corresponding roughening depth.

[0032] Furthermore, the photosensitive layers at different heights are made of different photosensitive materials, so that each photosensitive layer can present different colors when irradiated by an infrared light beam, which is convenient for operators to quickly identify the current chiseling depth.

[0033] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 4 The bottom of the photosensitive positioning plate 2 is connected to a support rod 22 extending downward, and the bottom end of the support rod 22 is connected to a chassis 23 for supporting on the ground.

[0034] In this embodiment, for easy operation, the photosensitive positioning plate 2 can be directly placed on the ground through the support rod 22 and the chassis 23, so that the operator can move the photosensitive positioning plate 2 at any time as the roughening area is moved. The chassis 23 is a disc-shaped component to increase the contact area with the ground and ensure the stability of the photosensitive positioning plate 2.

[0035] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 4 The support rod 22 includes an outer sleeve 221 connected to the chassis 23 and a connecting rod 222 slidably connected to the outer sleeve 221. The photosensitive positioning plate 2 is connected to the upper end of the connecting rod 222. A locking screw 223 is provided between the outer sleeve 221 and the connecting rod 222. The inner end of the locking screw 223 passes through the peripheral wall of the outer sleeve 221 and is used to abut against the outer periphery of the connecting rod 222.

[0036] In this embodiment, by pulling the connecting rod 222 to slide up and down along the outer sleeve 221, the photosensitive positioning plate 2 can be driven to move up and down, so that the positioning strip 21 at the center line position on the photosensitive positioning plate 2 is aligned with the center axis of the infrared transmitter 1 on the main body 10 to determine the initial roughening position. At the same time, the height of the photosensitive positioning plate 2 can be adjusted by the relative sliding of the connecting rod 222 and the outer sleeve 221, so that the photosensitive positioning plate 2 can meet the alignment requirements of the infrared transmitter 1 on the main body 10 of different specifications.

[0037] Specifically, a radially extending locking screw 223 is provided on the peripheral wall of the outer sleeve 221, and the inner end of the locking screw 223 penetrates the peripheral wall of the outer sleeve 221 and abuts against the peripheral wall of the connecting rod 222. When the connecting rod 222 drives the photosensitive positioning plate 2 to slide to a suitable position, the locking screw 223 is tightened to fix the height of the photosensitive positioning plate 2.

[0038] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 1 There are two corresponding groups of infrared emitters 1 and photosensitive positioning plates 2, and the two infrared emitters 1 are respectively arranged close to the two side walls of the main body 10.

[0039] In this embodiment, a plurality of chiseling heads 20 are arranged along the direction perpendicular to the main body 10, the interval width between the two infrared emitters 1 is the same as the interval width between the two outermost chiseling heads 20, and the two photosensitive positioning plates 2 are arranged one-to-one with the two infrared emitters 1. By correspondingly arranging the two sets of infrared emitters 1 and the photosensitive positioning plates 2, it is possible to ensure that the chiseling depths of the two outermost chiseling heads 20 are the same, further ensuring the uniformity of the chiseling.

[0040] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 2 and Figure 3The infrared transmitter 1 is connected to the main body 10 through the clamping seat 3. The clamping seat 3 includes a lower supporting seat 31 connected to the top surface of the main body 10 and an upper clamping block 32 hinged on the lower supporting seat 31. The lower supporting seat 31 is provided with a lower half groove 311 which opens upward and passes through the moving direction of the main body 10. The upper clamping block 32 is provided with an upper half groove 321 which opens downward and passes through the moving direction of the main body 10. The upper half groove 321 and the lower half groove 311 are arranged correspondingly up and down and can enclose a mounting hole for accommodating the infrared transmitter 1.

[0041] In this embodiment, the infrared transmitter 1 has a cylindrical shape and can be clamped on the outer circumference of the infrared transmitter 1 by the lower half groove 311 on the lower bracket 31 and the upper half groove 321 on the upper clamping block 32, thereby fixing the infrared transmitter 1.

[0042] Specifically, one side of the upper clamping block 32 is rotatably connected to one side of the lower bracket 31 via a rotating shaft, and the other side is connected via fasteners such as screws. The upper clamping block 32 is flipped open around the rotating shaft, and the infrared transmitter 1 is placed in the lower half groove 311 of the lower bracket 31. The upper clamping block 32 is then flipped around the rotating shaft until the upper half groove 321 is attached to the peripheral wall of the infrared transmitter 1, and finally the upper clamping block 32 is fastened to the lower bracket 31 via screws.

[0043] Furthermore, elastic gaskets are provided in the lower groove 311 and the upper groove 321 to prevent the vibration generated during the roughening process from causing damage to the infrared emitter 1.

[0044] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 3 An axially extending bubble level 11 is provided on the peripheral wall of the infrared transmitter 1, and an escape groove 322 is provided on the upper clamping block 32 for the bubble level 11 to be exposed.

[0045] In this embodiment, the bubble level 11 is integrated with the infrared transmitter 1. When the infrared transmitter 1 is clamped in the clamping seat 3, it is necessary to make sure that the bubble level 11 located on the peripheral wall of the infrared transmitter 1 faces upward and the bubble level 11 is located in the avoidance groove 322 of the upper clamping block 32, so that the operator can observe the bubble level 11.

[0046] Specifically, the avoidance groove 322 is arranged on the outer groove wall of the upper half groove 321 so that the upper clamping block 32 passes through from top to bottom. Meanwhile, the avoidance groove 322 extends axially to ensure that the bubble level 11 is completely exposed.

[0047] By observing whether the bubble in the bubble level 11 is centered, it can be determined whether the main body 10 is in a horizontal state, and further whether the working surface of the chiseling head 20 is in a horizontal state. If the bubble in the bubble level 11 is significantly offset during the chiseling process, it is necessary to adjust the force direction of the push rod 40 to keep the main body 10 horizontal, ensure that the infrared beam emitted by the infrared transmitter 1 is horizontally projected onto the photosensitive positioning plate 2, and ensure the accurate positioning of the chiseling depth.

[0048] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 2 A lighting lamp 4 is connected to the front side wall of the main body 10 , and a shock-absorbing pad 41 is provided between the lighting lamp 4 and the main body 10 .

[0049] In this embodiment, the battery located inside the main body 10 provides power for the lighting lamp 4, and a switch button is provided on the lighting lamp 4. When construction at night is required due to tight schedule, the lighting lamp 4 can be turned on for lighting to ensure the roughening effect during night construction.

[0050] Specifically, the housing of the illuminating lamp 4 is connected to the front wall of the main body 10 by bolts. At the same time, in order to prevent the vibration of the chiseling from damaging the illuminating lamp 4, a shock-absorbing pad 41 is arranged between the housing of the illuminating lamp 4 and the main body 10 to buffer the vibration impact. The shock-absorbing pad 41 adopts a double-layer rubber vibration-isolating pad.

[0051] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 1 and Figure 5 A dust box (not shown in the figure) is provided in the main body 10, and a dust suction port 5 is provided at the bottom of the main body 10, which passes through the bottom wall of the main body 10 and is connected to the dust box. A negative pressure pipeline 6 connected to the dust box is connected to the main body 10.

[0052] In this embodiment, the negative pressure pipeline 6 is connected to the external air source. While the chiseling operation is being performed, the external negative pressure air source is turned on, and the dust box in the main body 10 is kept in a negative pressure state through the negative pressure pipeline 6, so that the dust generated during the chiseling can be sucked into the dust box through the dust suction port 5, thereby reducing the harm caused by the dust to the health of the operator, and at the same time implementing the requirements of civilized construction.

[0053] Specifically, the dust box is connected to the main body 10 through a snap-fit ​​structure, which facilitates regular disassembly and cleaning of the dust box.

[0054] As a specific implementation of a hand-push concrete chiseling machine provided by the utility model, see Figure 5 The dust suction port 5 extends in a direction perpendicular to the moving direction of the main body 10 , and two dust suction ports 5 are provided, and the two dust suction ports 5 are arranged at intervals along the moving direction of the main body 10 .

[0055] In this embodiment, the chiseling heads 20 are arranged in two rows along the moving direction of the main body 10, and each row is provided with a plurality of chiseling heads 20. Two dust suction ports 5 are respectively located on the outside of the two rows of chiseling heads 20, that is, the two dust suction ports 5 are respectively arranged close to the front and rear side walls of the main body 10, which can prevent dust from escaping. At the same time, the length of the dust suction port 5 is roughly equal to the length of each row of chiseling heads 20, so as to collect dust generated by the chiseling heads 20 when chiseling to the maximum extent.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hand-propelled concrete chiseling machine, characterized in that: It includes a main body and a photosensitive positioning plate, a plurality of chiseling heads are arranged at the bottom of the main body, a walking wheel and a push rod are respectively arranged at the rear side of the main body, an infrared transmitter is arranged on the main body, and the emission direction of the infrared transmitter is parallel to the walking direction of the main body, the photosensitive positioning plate is used to be set on the ground to be chiseled, and the photosensitive positioning plate and the infrared transmitter are arranged in front and behind, a plurality of horizontally extending positioning strips are arranged on the side of the photosensitive positioning plate facing the infrared transmitter, and the plurality of positioning strips are arranged in sequence from top to bottom, and the photosensitive positioning plate is used to receive the infrared rays emitted by the infrared transmitter and display the height of the infrared transmitter through the positioning strips.

2. A hand-push concrete chiseling machine as claimed in claim 1, characterized in that: The positioning strip is covered with a photosensitive layer, and the photosensitive layers on the positioning strips at different heights are made of different photosensitive materials.

3. A hand-push concrete chiseling machine as claimed in claim 1, characterized in that: The bottom of the photosensitive positioning plate is connected to a support rod extending downward, and the bottom end of the support rod is connected to a chassis for supporting on the ground.

4. A hand-propelled concrete chiseling machine as claimed in claim 3, characterized in that: The supporting rod comprises an outer sleeve connected to the chassis and a connecting rod slidably connected to the outer sleeve, the photosensitive positioning plate is connected to the upper end of the connecting rod, a locking screw is provided between the outer sleeve and the connecting rod, the inner end of the locking screw passes through the peripheral wall of the outer sleeve and is used to abut against the outer periphery of the connecting rod.

5. A hand-propelled concrete chiseling machine as claimed in claim 1, characterized in that: The infrared emitters and the photosensitive positioning plates are respectively provided with two groups, and the two infrared emitters are respectively arranged close to the two side walls of the main body.

6. A hand-propelled concrete chiseling machine as claimed in claim 5, characterized in that: The infrared transmitter is connected to the main body through a clamping seat, and the clamping seat includes a lower supporting seat connected to the top surface of the main body and an upper clamping block hinged above the lower supporting seat. The lower supporting seat is provided with a lower half groove opening upward and passing through the moving direction of the main body, and the upper clamping block is provided with an upper half groove opening downward and passing through the moving direction of the main body. The upper half groove and the lower half groove are arranged correspondingly up and down and can be enclosed to form a mounting hole for accommodating the infrared transmitter.

7. A hand-propelled concrete chiseling machine as claimed in claim 6, characterized in that: An axially extending bubble level is provided on the peripheral wall of the infrared transmitter, and an escape groove which penetrates vertically and allows the bubble level to be exposed is provided on the upper clamping block.

8. A hand-propelled concrete chiseling machine as claimed in claim 1, characterized in that: A lighting lamp is connected to the front side wall of the main body, and a shock-absorbing pad is arranged between the lighting lamp and the main body.

9. A hand-propelled concrete chiseling machine as claimed in claim 1, characterized in that: A dust box is arranged in the main body, a dust suction port is arranged at the bottom of the main body, which passes through the bottom wall of the main body and is connected to the dust box, and a negative pressure pipeline connected to the dust box is connected to the main body.

10. A hand-propelled concrete chiseling machine as claimed in claim 9, characterized in that: The dust suction port extends in a direction perpendicular to the moving direction of the main body, and two dust suction ports are provided, and the two dust suction ports are arranged at intervals along the moving direction of the main body.

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