Concrete handheld cutting machine

Abstract

The utility model discloses a concrete handheld cutting machine which comprises a cutting machine body, a cutting blade is arranged on an output shaft of the cutting machine body, a small cutting blade is coaxially arranged on the cutting blade, and the small cutting blade is tightly attached to the cutting blade and connected with the cutting blade through a bolt. And the diameter of the small cutting blade is smaller than that of the cutting blade. The concrete handheld cutting machine has the advantage that the cutting blade is not clamped when concrete is cut.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting machines, and in particular relates to a handheld concrete cutting machine. Background Art

[0002] As a cutting tool that can cut various metal profiles, wood and plastic sheets, handheld cutters have the advantages of simple operation, fast cutting speed and easy portability. At present, the market demand for handheld cutters is large and they are popular among users and widely used in various industries. However, when cutting concrete with handheld cutters, the cutting blade may be clamped due to the thin cutting seam, making it difficult to remove the cutting blade, which affects the use of the cutter and the cutting quality. Summary of the invention

[0003] The utility model aims to provide a hand-held concrete cutter to solve the above problems existing in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A handheld concrete cutter comprises a cutter body, an output shaft of the cutter body is provided with a cutting blade, a small cutting piece is coaxially provided on the cutting blade, the small cutting piece is tightly fitted with the cutting blade and connected with the cutting blade by bolts, and the diameter of the small cutting piece is smaller than the diameter of the cutting blade.

[0006] The working process and principle of the above structure are as follows:

[0007] When in use, the small cutting disc is fixed on the cutting blade so that the small cutting disc fits tightly against the cutting blade and is installed without protrusions. This allows the cutting blade to grind a wider spacing on the concrete during the cutting process, making it easier to remove the cutting blade from the concrete, thereby improving ease of use.

[0008] Furthermore, a plurality of cutting notches are evenly spaced in a circumferential array on the edge of the cutting blade, and a cutting arc opening is provided at the edge of the small cutting sheet at the position corresponding to the cutting notch of the cutting blade.

[0009] The cutting notch facilitates the cutting blade to cut concrete, and the setting of the cutting arc mouth facilitates the small cutting blade to cooperate to cut a larger cutting distance.

[0010] Furthermore, an arc-shaped inner recess is provided between every two adjacent arc-shaped cutting openings on the small cutting blade.

[0011] The setting of the arc-shaped inner concave opening facilitates the cutting arc opening on the small cutting piece to play a role in assisting the cutting, thereby preventing the working progress of the cutting blade from being affected.

[0012] Furthermore, a protective cover is fixedly provided on the cutting machine body at a position corresponding to the cutting blade. The protective cover is semicircular and connected to the output shaft of the cutting machine body. The cutting blade is arranged in the protective cover.

[0013] The setting of the protective cover can prevent the cutting chips from splashing and injuring the workers.

[0014] Furthermore, a rotatable and retractable arc-shaped cover is provided on one side of the protective cover, one end of the arc-shaped cover is rotatably connected to the output shaft, and the other end of the arc-shaped cover is slidably arranged in the protective cover, the cutting blade is located inside the arc-shaped cover, and a limiting push plate is provided on the outer edge of the free end of the arc-shaped cover, and the limiting push plate is located outside the protective cover when the arc-shaped cover is retracted in the protective cover.

[0015] The setting of the rotatable and retractable arc cover can adjust the cutting depth of the cutting blade and play a limiting role. The setting of the limiting push plate facilitates manual adjustment of the position of the arc cover.

[0016] Furthermore, a depth scale is provided on the arc edge of the surface of the arc cover.

[0017] The setting of the depth scale helps to make cutting more accurate, avoiding the method of determining the cutting depth based on senses, and ensuring the cutting effect.

[0018] Furthermore, the outer side of the protective cover is connected with a suction pipe.

[0019] The setting of the suction pipe makes it easy to connect the dust collector to suck the inside of the protective cover, thereby reducing the pollution of cutting waste.

[0020] Beneficial effects: The utility model fixes the small cutting blade on the cutting blade during use, so that the small cutting blade fits tightly with the cutting blade and is installed without protrusions, so that the small cutting blade can grind a wider spacing on the concrete during the cutting process, which is convenient for taking the cutting blade out of the concrete, thereby improving the convenience of use;

[0021] The setting of the rotatable and retractable arc cover can adjust the cutting depth of the cutting blade and play a limiting role. The setting of the limit push plate facilitates manual adjustment of the position of the arc cover.

[0022] The setting of the depth scale helps to make cutting more accurate, avoiding the method of determining the cutting depth based on senses, and ensuring the cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall structural front view of the utility model;

[0024] Figure 2This is a front view of the structure of the utility model without the protective cover;

[0025] Figure 3 The utility model is a structural side view without the protective cover.

[0026] Figure numerals: 1. Cutting machine body; 2. Cutting blade; 3. Small cutting disc; 4. Cutting notch; 5. Cutting arc opening; 6. Arc inner recess; 7. Protective cover; 8. Arc cover; 9. Limit push plate; 10. Depth scale; 11. Suction tube. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model. Example

[0028] like Figure 1-Figure 3 As shown, this embodiment provides a handheld concrete cutter, including a cutter body 1, the output shaft of the cutter body 1 is provided with a cutting blade 2, a small cutting piece 3 is coaxially provided on the cutting blade 2, the small cutting piece 3 is tightly fitted with the cutting blade 2 and is connected to the cutting blade 2 by bolts, and the diameter of the small cutting piece 3 is smaller than the diameter of the cutting blade 2.

[0029] The working process and principle of the above structure are as follows:

[0030] When in use, the small cutting disc 3 is fixedly set on the cutting blade 2, so that the small cutting disc 3 fits tightly against the cutting blade 2 and is installed without protrusions. This can facilitate the cutting blade 2 to grind a wider spacing on the concrete during the cutting process, making it easier to remove the cutting blade 2 from the concrete, thereby improving the convenience of use.

[0031] In another embodiment of the present invention, Figure 1-Figure 3 As shown, a plurality of cutting notches 4 are evenly spaced in a circumferential array on the edge of the cutting blade 2 , and a cutting arc opening 5 is provided at the edge of the small cutting piece 3 at the position corresponding to the cutting notches 4 of the cutting blade 2 .

[0032] The cutting notch 4 facilitates the cutting blade 2 to cut concrete, and the setting of the cutting arc opening 5 facilitates the small cutting blade 3 to cooperate in cutting a larger cutting spacing.

[0033] In another embodiment of the present invention, Figure 1-Figure 3 As shown, an arc-shaped inner notch 6 is provided between every two adjacent arc-shaped cutting openings 5 ​​on the small cutting blade 3 .

[0034] The arrangement of the arc-shaped inner notch 6 facilitates the arc-shaped cutting opening 5 on the small cutting blade 3 to assist in the cutting, thereby preventing the working progress of the cutting blade 2 from being affected.

[0035] In another embodiment of the present invention, Figure 1-Figure 3 As shown, a protective cover 7 is fixedly provided on the cutting machine body 1 at a position corresponding to the cutting blade 2 . The protective cover 7 is semicircular and connected to the output shaft of the cutting machine body 1 . The cutting blade 2 is arranged in the protective cover 7 .

[0036] The provision of the protective cover 7 can prevent the cutting debris from splashing and injuring the worker.

[0037] In another embodiment of the present invention, Figure 1-Figure 3 As shown, a rotatable and retractable arc cover 8 is provided on one side of the protective cover 7, one end of the arc cover 8 is rotatably connected to the output shaft, and the other end of the arc cover 8 is slidably arranged in the protective cover 7. An arc long hole is provided on the surface of the protective cover 7, and the center of the arc long hole coincides with the axis of the output shaft. A locking bolt is provided on the arc cover 8, which passes through the arc long hole and is fastened by a locking nut. The tightness of the arc cover 8 is adjusted by adjusting the tightness of the locking nut, so that the position of the arc cover 8 can be adjusted and it can be fixed conveniently. The cutting blade 2 is located inside the arc cover 8, and a limit push plate 9 is provided on the outer edge of the free end of the arc cover 8. The limit push plate 9 is located outside the protective cover 7 when the arc cover 8 is retracted in the protective cover 7.

[0038] The setting of the rotatable and retractable arc cover 8 can adjust the cutting depth of the cutting blade 2 and play a limiting role. The setting of the limiting push plate 9 facilitates manual adjustment of the position of the arc cover 8.

[0039] In another embodiment of the present invention, Figure 1-Figure 3 As shown, the arc-shaped edge of the surface of the arc-shaped cover 8 is provided with a depth scale 10. The depth scale 10 is arranged in an arc shape along the arc-shaped edge of the arc-shaped cover 8.

[0040] The setting of the depth scale 10 helps to perform cutting more accurately, avoids the method of determining the cutting depth based on senses, and ensures the cutting effect.

[0041] In another embodiment of the present invention, Figure 1-Figure 3 As shown, a suction pipe 11 is connected to the outer side of the protective cover 7 .

[0042] The provision of the suction pipe 11 facilitates the connection of a dust collector to suction the inside of the protective cover 7, thereby reducing pollution from cutting waste.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hand-held concrete cutting machine, characterized in that: The invention comprises a cutting machine body, wherein the output shaft of the cutting machine body is provided with a cutting blade, and a small cutting piece is coaxially provided on the cutting blade. The small cutting piece is closely fitted with the cutting blade, and the diameter of the small cutting piece is smaller than the diameter of the cutting blade.

2. The hand-held concrete cutting machine according to claim 1, characterized in that: A plurality of cutting notches are evenly spaced in a circumferential array on the edge of the cutting blade, and a cutting arc opening is arranged at the position of the cutting notch of the cutting blade on the edge of the small cutting sheet.

3. The hand-held concrete cutter according to claim 2, characterized in that: An arc-shaped inner notch is arranged between every two adjacent arc-shaped cutting openings on the small cutting blade.

4. The hand-held concrete cutter according to claim 1, characterized in that: A protective cover is fixedly arranged on the cutting machine body at a position corresponding to the cutting blade. The protective cover is semicircular and connected to the output shaft of the cutting machine body. The cutting blade is arranged in the protective cover.

5. The hand-held concrete cutting machine according to claim 4, characterized in that: A rotatable and retractable arc-shaped cover is provided on one side of the protective cover, one end of the arc-shaped cover is rotatably connected to the output shaft, and the other end of the arc-shaped cover is slidably arranged in the protective cover, the cutting blade is located inside the arc-shaped cover, and a limiting push plate is provided on the outer edge of the free end of the arc-shaped cover, and the limiting push plate is located outside the protective cover when the arc-shaped cover is retracted in the protective cover.

6. The hand-held concrete cutting machine according to claim 5, characterized in that: A depth scale is arranged on the arc edge of the surface of the arc cover.

7. The hand-held concrete cutter according to claim 4, characterized in that: The outer side of the protective cover is connected with a suction pipe.

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