Handheld double-protection cutting machine

Abstract

The utility model discloses a handheld double-protection cutting machine. The handheld double-protection cutting machine comprises a handheld seat and a cutting mechanism, the cutting mechanism comprises a saw blade and a protection assembly; the protection assembly comprises a protection cover, and a first protection plate and a second protection plate which are assembled on the protection cover; the protective cover comprises a cover plate and a cover edge; the cover edge and the cover plate jointly define an operation groove allowing the saw blade to rotate, and an operation notch allowing part of the saw blade to be exposed is formed in the lower portion of the cover edge. When the first protection plate is located at the initial position, the first protection plate is located in the operation notch, the protection edge of the first protection plate is arranged below the saw blade in a surrounding mode, and the first protection plate can swing upwards into the operation groove under abutting of the cutting piece. The side edge of the cover edge is provided with an outward extending wing extending towards the outer portion of the operation groove, the second protection plate is rotationally assembled on the outward extending wing, when the second protection plate is located at the initial position, the lower edge of the second protection plate is lower than the lower edge of the saw blade, and the second protection plate can swing upwards to the rear portion of the outward extending wing under abutting of the cutting piece. According to the utility model, double protection can be realized, and the protection effect is better.

Description

Technical Field

[0001] This utility model belongs to the field of cutting machine technology, specifically relating to a handheld double-protection cutting machine. Background Technology

[0002] Handheld saw cutters are mainly used for cutting hard materials such as organs, tiles, flooring, and stone. To improve safety, the saw blade is usually equipped with a protective cover and a protective plate. During cutting, the protective plate retracts under external force, exposing part of the saw blade. After cutting, the protective plate returns to its original position to protect the cutting blade. However, in practical applications, flying debris can easily get stuck in the gap between the protective plate and the base, causing the protective plate to be unable to return to its original position and lose its protective function. Summary of the Invention

[0003] This invention addresses the problem in existing technologies where protective plates easily become mechanically jammed and unable to reset due to debris accumulation during frequent operation, resulting in poor protective performance. It provides a handheld, double-protection cutting machine. The objective of this invention is achieved through the following technical solution:

[0004] A handheld double-protection cutting machine includes a handheld base and a cutting mechanism mounted on the front end of the handheld base. The cutting mechanism includes a saw blade and a protective assembly. The protective assembly includes a protective cover fixedly mounted on the handheld base, and a first protective plate and a second protective plate mounted on the protective cover. The protective cover includes a cover plate and a cover edge formed around the cover plate. A first mounting piece protrudes from the front wall of the cover plate, and the first protective plate is rotatably mounted on the first mounting piece. A second mounting piece protrudes from the rear wall of the cover plate and is fitted onto the handheld base. The first and second mounting pieces have aligned through holes for the drive shaft to pass through. The saw blade is mounted on the front end of the drive shaft. The cover edge and the cover plate together define a working groove for the saw blade to rotate, and a groove for the saw blade to rotate is provided below the cover edge. The saw blade has an exposed working notch; the first protective plate is rotatably mounted on the first assembly. When the first protective plate is in its initial position, it is located within the working notch, and the guard edge of the first protective plate surrounds the bottom of the saw blade. The first protective plate can be swung up into the working groove under the support of the cutting element. A first torsion spring is installed between the first protective plate and the protective cover to reset the first protective plate to the working notch; the side edge of the cover is formed with an outwardly extending wing extending outward from the working groove. The second protective plate is rotatably mounted on the outwardly extending wing. When the second protective plate is in its initial position, its lower edge is lower than the lower edge of the saw blade. The second protective plate can be swung up behind the outwardly extending wing under the support of the cutting element. A second torsion spring is installed between the second protective plate and the outwardly extending wing to reset the second protective plate to its initial position.

[0005] Preferably, the rotation axis of the first protective plate coincides with the rotation axis of the saw blade, and the rotation axis of the second protective plate is parallel to the rotation axis of the saw blade.

[0006] Preferably, the second protective plate includes a fan-shaped plate and an arc-shaped protective edge, wherein a rotating hole is provided on the fan-shaped plate, and an assembly shaft is formed by the outward wing and passes through the rotating hole.

[0007] Preferably, the leading edge of the arc-shaped protective edge protrudes beyond the plane of the sector plate, and both the arc-shaped protective edge and the inner wall of the sector plate are formed with reinforcing ribs.

[0008] Preferably, a first supporting flat wall is formed at the junction of the arc-shaped protective edge and the fan-shaped plate; a second supporting flat wall is formed at the bottom of the outward-spreading wing; when the second protective plate is moved to the rear of the outward-spreading wing, the first supporting flat wall and the second supporting flat wall are flush.

[0009] Preferably, the rear wall of the protective cover is fitted with a base, the base including a support plate and an adjusting ruler, the first end of the support plate is hinged to the bottom of the protective cover, and the adjusting ruler is fitted to the second end of the support plate.

[0010] Preferably, the adjusting ruler has an arc-shaped adjusting groove, and the rear wall of the protective cover is fitted with an adjusting stud, which is inserted into the arc-shaped adjusting groove.

[0011] Preferably, the handheld base includes a housing and a front cover fastened to the end of the housing, and a drive motor and a gearbox are installed inside the handheld base; the cutting mechanism is mounted on the front cover.

[0012] Compared with the prior art, the present invention has the following technical effects: In addition to the fixed protective cover, the protective component is also equipped with a first protective plate and a second protective plate that can rotate, forming double protection and providing better protection; the second protective plate is set away from the working groove and will not be affected by sawdust; when the first protective plate cannot be quickly reset due to sawdust jamming, the second protective plate can always be reset smoothly, providing reliable protection and improving operational safety; the second protective plate and the outward wing structure are reasonably set, and the two supporting flat walls can work with the support plate to form effective support for the cutting machine, improving the operational stability of the cutting machine. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the cutting mechanism structure in this utility model;

[0015] Figure 3 This is a schematic diagram of the protective component structure in this utility model;

[0016] Figure 4 This is a schematic diagram of the protective cover structure in this utility model;

[0017] Figure 5 This is a schematic diagram of the second protective plate structure in this utility model;

[0018] Markings in the diagram: Casing 11; Front cover 12; Saw blade 20; Protective cover 30; Cover plate 31; First assembly 311; Second assembly 312; Cover edge 32; Outward wing 321; Second support flat wall 3211; First protective plate 40; Second protective plate 50; Fan-shaped plate 51; Arc-shaped protective edge 52; Reinforcing rib 53; First support flat wall 54; Support plate 61; Adjusting ruler 62; Arc-shaped adjusting groove 621; Adjusting stud 70. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0020] See Figures 1-5 This embodiment discloses a handheld double-protection cutting machine, which includes a handheld base and a cutting mechanism assembled at the front end of the handheld base; the handheld base includes a housing 11 and a front cover 12 fastened to the end of the housing 11, and a drive motor and a gearbox are assembled inside the handheld base; the cutting mechanism is assembled on the front cover 12; the cutting mechanism includes a saw blade 20 and a protective component, the protective component includes a protective cover 30 fixedly assembled on the handheld base, and a first protective plate 40 and a second protective plate 50 assembled on the protective cover 30.

[0021] The protective cover 30 includes a cover plate 31 and a cover edge 32 formed around the cover plate 31. The front wall of the cover plate 31 is provided with a first mounting bracket 311, and the first protective plate 40 is rotatably mounted on the first mounting bracket 311. The rear wall of the cover plate 31 is provided with a second mounting bracket 312 that is fitted onto the hand-held base. The first mounting bracket 311 and the second mounting bracket 312 are provided with aligned through holes for the drive shaft to pass through. The saw blade 20 is mounted on the front end of the drive shaft. The cover edge 32 and the cover plate 31 together define a working groove for the saw blade 20 to rotate, and the lower part of the cover edge 32 is provided with a working notch for the saw blade 20 to be partially exposed.

[0022] The first protective plate 40 is rotatably mounted on the first assembly 311. When the first protective plate 40 is in the initial position, it is located in the working notch, and the guard edge of the first protective plate 40 surrounds the bottom of the saw blade 20. The first protective plate 40 can be swung up into the working groove under the support of the cutting workpiece, and the lower edge of the saw blade 20 is exposed, so that the cutting operation can be carried out. A first torsion spring is installed between the first protective plate 40 and the protective cover 30 to reset the first protective plate 40 to the working notch. After the cutting operation is completed, the cutting machine is lifted, and the first protective plate 40 is removed from the cutting workpiece, so that the first protective plate 40 can be reset to achieve the protective function.

[0023] The side edge of the cover 32 is formed with an outwardly extending wing 321 extending outward from the working groove. The second protective plate 50 is rotatably mounted on the outwardly extending wing 321. When the second protective plate 50 is in the initial position, its lower edge is lower than the lower edge of the saw blade 20. The second protective plate 50 can be swung up behind the outwardly extending wing 321 under the support of the cutting workpiece, so that the cutting operation can be carried out. A second torsion spring is installed between the second protective plate 50 and the outwardly extending wing 321 to reset the second protective plate 50 to the initial position. After the cutting operation is completed, the cutting machine is lifted, and the second protective plate 50 is removed from the cutting workpiece. The second protective plate 50 can be reset to achieve the protective function. The second protective plate 50 is set away from the working groove and will not be affected by sawdust. When the first protective plate 40 cannot be reset quickly due to sawdust jamming, the second protective plate 50 can always be reset smoothly, providing reliable protection and improving operational safety.

[0024] To make the entire cutting machine more compact and provide better protection, the rotation axis of the first protective plate 40 coincides with the rotation axis of the saw blade 20, and the rotation axis of the second protective plate 50 is parallel to the rotation axis of the saw blade 20.

[0025] The second protective plate 50 includes a fan-shaped plate 51 and an arc-shaped protective edge 52. The fan-shaped plate 51 has a rotating hole, and the outward-spreading wing 321 is formed by an assembly shaft passing through the rotating hole. The leading edge of the arc-shaped protective edge 52 protrudes from the plane of the fan-shaped plate 51, providing reliable protection. Both the arc-shaped protective edge 52 and the inner wall of the fan-shaped plate 51 are formed with reinforcing ribs 53 to improve their structural strength. A first supporting flat wall 54 is formed at the connection between the arc-shaped protective edge 52 and the fan-shaped plate 51. A second supporting flat wall 3211 is formed at the bottom of the outward-spreading wing 321. When the second protective plate 50 is swung up behind the outward-spreading wing 321, the first supporting flat wall 54 and the second supporting flat wall 3211 are flush. The two supporting flat walls can work with the support plate 61 to provide effective support for the cutting machine, improving the operational stability of the cutting machine.

[0026] The rear wall of the protective cover 30 is equipped with a base, which includes a support plate 61 and an adjusting ruler 62. The first end of the support plate 61 is hinged to the bottom of the protective cover 30, and the adjusting ruler 62 is assembled on the second end of the support plate 61. The adjusting ruler 62 has an arc-shaped adjusting groove 621. The rear wall of the protective cover 30 is equipped with an adjusting stud 70, which is inserted into the arc-shaped adjusting groove 621 to adjust the cutting depth.

[0027] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open-ended meaning, that is, equivalent to "at least comprising...", and should not be understood as having a closed-ended meaning, that is, its meaning should not be understood as "only comprising...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0028] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A hand-held dual guard cutter comprising a hand-held housing, and a cutting mechanism mounted at a front end of the hand-held housing, characterized in that, The cutting mechanism comprises a saw blade and a protection assembly, the protection assembly comprises a protection cover fixedly assembled on the hand-held seat, and a first protection plate and a second protection plate assembled on the protection cover; the protection cover comprises a cover plate and a cover rail formed on the periphery of the cover plate, a second assembly sleeve is protruded on the front wall of the cover plate, a first assembly sleeve is protruded on the rear wall of the cover plate and sleeved on the hand-held seat, the first assembly sleeve and the second assembly sleeve are provided with a through hole for the driving shaft to pass through in the position alignment, and the saw blade is assembled on the front end of the driving shaft; the cover rail and the cover plate jointly define a working groove for the saw blade to rotate, and a working gap for the saw blade to partially leak out is arranged below the cover rail; the first protection plate is rotationally assembled on the first assembly sleeve, the first protection plate is located in the working gap when it is in the initial position, and the protection rail of the first protection plate is arranged below the saw blade, the first protection plate can be swung up to the working groove under the abutting of the cutting piece, and a first torsional spring is assembled between the first protection plate and the protection cover to reset the first protection plate to the working gap; the side rail of the cover rail is formed with an outward extending wing extending towards the outside of the working groove, and the second protection plate is rotationally assembled on the outward extending wing, the lower rail of the second protection plate is lower than the lower rail of the saw blade when the second protection plate is in the initial position, and the second protection plate can be swung up to the rear of the outward extending wing under the abutting of the cutting piece, and a second torsional spring is assembled between the second protection plate and the outward extending wing to reset the second protection plate to the initial position.

2. A hand-held double guarded cutter according to claim 1, characterized in that The rotation axis of the first protection plate coincides with the rotation axis of the saw blade, and the rotation axis of the second protection plate is parallel to the rotation axis of the saw blade.

3. A hand-held double guarded cutter according to claim 2, characterized in that The second protection plate comprises a sector plate and an arc-shaped protection rail, a rotation hole is formed in the sector plate, and an assembly shaft of the outward extending wing is arranged in the rotation hole.

4. A hand-held double guarded cutter according to claim 3, characterized in that The front rail of the arc-shaped protection rail protrudes from the plane of the sector plate, and the arc-shaped protection rail and the inner wall of the sector plate are both formed with reinforcing ribs.

5. A hand-held double guarded cutter according to claim 4, characterized in that The joint position of the arc-shaped protection rail and the sector plate is formed with a first supporting flat wall, and the bottom of the outward extending wing is formed with a second supporting flat wall; when the second protection plate is swung up to the rear of the outward extending wing, the first supporting flat wall is flush with the second supporting flat wall.

6. A hand-held double-guarded cutting machine according to any one of claims 1-5, characterized in that, The rear wall of the protection cover is assembled with a base, the base comprises a supporting plate and an adjusting ruler, the first end of the supporting plate is hinged to the bottom of the protection cover, and the adjusting ruler is assembled on the second end of the supporting plate.

7. A hand-held double guarded cutter according to claim 6, characterized in that An arc-shaped adjusting groove is formed in the adjusting ruler, and an adjusting stud is assembled on the rear wall of the protection cover and inserted into the arc-shaped adjusting groove.

8. A hand-held double-guarded cutting machine according to claim 1, characterized in that, The hand-held seat comprises a shell and a front cover buckled on the end of the shell, a driving motor and a speed reducer are assembled in the hand-held seat, and the cutting mechanism is assembled on the front cover.

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