Wall cutting annular saw

Abstract

The utility model relates to the technical field of annular saws, in particular to a wall cutting annular saw. A handle is arranged at the rear end of the shell, a control button is arranged at the position, located above the handle, of the shell, a saw blade is arranged at the front end of the shell, a plurality of guide rail grooves are formed in the saw blade, a plurality of guide wheels matched with the saw blade and the guide rail grooves are rotatably installed in front of the shell, and the guide wheels are all attached to the saw blade. A driving shaft of the driving motor is connected with a connecting rotating shaft, the front end of the connecting rotating shaft is connected with a driving gear, a plurality of tooth holes matched with the driving gear in tooth shape are evenly formed in the saw blade along the circumference, and the driving gear is meshed with the saw blade through the tooth holes. According to the annular saw, the driving motor is used, the saw blade is driven to rotate in a gear meshing mode, and therefore a traditional belt and driving wheel driving mode is replaced, it can be guaranteed that the saw blade is stably driven, and slipping is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of circular saws, in particular to a wall-cutting circular saw. Background Art

[0002] In construction projects, the cutting of walls is a common construction task, especially when carrying out the renovation, demolition or expansion of buildings. Existing wall-cutting methods usually use wall-cutting circular saws. Through the high-speed rotation of the circular saw blade, efficient and precise wall cutting can be achieved. Most existing circular saws are driven by motors or gasoline engines, transmitted to the drive wheels through belts, and transmitted by the fit between the drive wheels and the saw blade. However, during long-term use, the surfaces of the saw blade and the drive wheels will experience certain wear, resulting in a decrease in the fit between the two. During use, slippage is likely to occur, the rotation speed of the saw blade increases slowly when starting, and it cannot stop quickly when shutting down, greatly affecting the performance of the circular saw. Moreover, it is difficult to control the saw blade to stop in time in case of an accident, and the safety is low. Content of the Utility Model

[0003] The purpose of the utility model is to provide a reasonably designed wall-cutting circular saw aiming at the defects and deficiencies of the prior art, which can solve the above-mentioned defects.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions: It includes a housing, a handle is provided at the rear end of the housing, control buttons are provided on the housing above the handle, a saw blade is provided at the front end of the housing, several guide rail grooves are opened on the saw blade, several guide wheels matching the saw blade and the guide rail grooves are rotatably installed in front of the housing, the guide wheels are all in contact with the saw blade, a drive motor is arranged in the housing, a connecting rotating shaft is connected to the drive shaft of the drive motor, a drive gear is connected to the front end of the connecting rotating shaft, several tooth holes matching the tooth shape of the drive gear are evenly opened along the circumference in the saw blade, and the drive gear is meshed with the saw blade through the tooth holes.

[0005] Preferably, a protective cover is provided at the front end of the housing, and the saw blade, the guide wheels and the contact part between the guide rail grooves and the guide wheels are all arranged inside the protective cover.

[0006] Preferably, a group of guide wheels are respectively provided on both sides inside the protective cover, each group includes two guide wheels, and the two groups of guide wheels are symmetrically arranged.

[0007] Preferably, several adjusting knobs are provided on one side of the protective cover, a threaded adjusting component is connected to the adjusting knobs, and several groups of threaded adjusting components are respectively connected to the rotating shafts for installing the guide wheels on the same side.

[0008] Preferably, the control buttons are electrically connected to the drive motor.

[0009] After adopting the above structure, the beneficial effects of the utility model are as follows:

[0010] This circular saw uses a drive motor to drive the saw blade to rotate by means of gear meshing, replacing the traditional belt and drive wheel drive methods, which can ensure stable drive of the saw blade and prevent slipping. Brief Description of the Drawings

[0011] Figure 1 is a schematic diagram of the external structure of the present utility model;

[0012] Figure 2 is a front view of the present utility model;

[0013] Figure 3 is a schematic diagram of the internal structure of the present utility model.

[0014] Description of the Reference Numerals in the Drawings:

[0015] 1. Housing; 2. Grip; 3. Control Button; 4. Guard; 5. Adjustment Knob; 6. Guide Wheel; 7. Saw Blade; 8. Drive Motor; 9. Connecting Rotating Shaft; 10. Driving Gear; 11. Tooth Hole; 12. Guide Rail Groove. Detailed Description of the Preferred Embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Refer to Figures 1 - 3 As shown, it includes a housing 1. A grip 2 is provided at the rear end of the housing 1. A control button 3 is provided on the housing 1 above the grip 2. The control button 3 is electrically connected to the drive motor 8. A guard 4 is provided at the front end of the housing 1. A saw blade 7 is provided inside the guard 4. Several guide rail grooves 12 are formed on the saw blade 7. A set of guide wheels 6 are respectively provided on both sides inside the guard 4. Each set includes two guide wheels 6. The two sets of guide wheels 6 are symmetrically arranged. The guide wheels 6 are all in contact with the saw blade 7. A guide bar matching the guide rail groove 12 is provided on one set of guide wheels 6. The guide bar is arranged in the guide rail groove 12. A drive motor 8 is arranged inside the housing 1. A connecting rotating shaft 9 is connected to the drive shaft of the drive motor 8. A driving gear 10 is connected to the front end of the connecting rotating shaft 9. A number of tooth holes 11 matching the tooth shape of the driving gear 10 are evenly formed in the saw blade 7 along the circumference. The driving gear 10 is meshed with the saw blade 7 through the tooth holes 11;

[0018] Several adjustment knobs 5 are provided on one side of the guard 4. A threaded adjustment assembly is connected to the adjustment knob 5. The several threaded adjustment assemblies are respectively connected to the rotating shafts for installing the guide wheels 6 on the same side.

[0019] Principle and Usage Process of the Present Utility Model:

[0020] During installation, first adjust the adjusting knob 5 to drive the guide wheel 6 on one side to move outwards, so that the saw blade 7 can be installed. At the same time, engage the teeth of the driving gear 10 into the tooth holes 11, and then tighten the adjusting knob 5 so that the guide wheel 6 clamps the saw blade 7, and the guiding strip enters the guide rail groove 12, and then it can be used;

[0021] During use, press the control button 3 to start the driving motor 8. The driving gear 10 is driven to rotate through the connecting rotating shaft 9, and then the saw blade 7 is driven to rotate. When the control button 3 is released, the driving motor 8 stops rotating, and the driving gear 10 and the saw blade 7 immediately stop rotating. Due to the gear meshing effect, the saw blade 7 will not slip;

[0022] When the saw blade 7 needs to be replaced, loosen the adjusting knob 5, and the new saw blade 7 can be installed in the same way as installing the saw blade 7 described above.

[0023] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A wall cutting circular saw, comprising a housing (1), a handle (2) being provided at the rear end of the housing (1), and a control button (3) being provided on the housing (1) above the handle (2), wherein: A saw blade (7) is arranged at the front end of the housing (1), and a plurality of guide rail grooves (12) are formed on the saw blade (7). A plurality of guide wheels (6) matching the saw blade (7) and the guide rail grooves (12) are rotatably mounted in front of the housing (1), and the guide wheels (6) are all fitted with the saw blade (7). A driving motor (8) is arranged in the housing (1), and a connecting shaft (9) is connected to the driving shaft of the driving motor (8), and a driving gear (10) is connected to the front end of the connecting shaft (9). A plurality of tooth holes (11) matching the tooth shape of the driving gear (10) are uniformly formed in the saw blade (7) along the circumference, and the driving gear (10) is meshed with the saw blade (7) through the tooth holes (11).

2. A wall cutting circular saw according to claim 1, characterized in that: A guard (4) is provided at the front end of the housing (1); the saw blade (7), the guide wheel (6) and the joint between the guide rail groove (12) and the guide wheel (6) are all arranged inside the guard (4).

3. A wall cutting circular saw according to claim 2, characterized in that: A group of guide wheels (6) is respectively arranged on both sides of the shield (4), each group comprises two guide wheels (6), and the two groups of guide wheels (6) are symmetrically arranged.

4. A wall cutting circular saw according to claim 3, characterized in that: A plurality of adjusting knobs (5) are provided on one side of the protective cover (4), and a threaded adjusting assembly is connected to the adjusting knob (5), and the plurality of threaded adjusting assemblies are respectively connected to a plurality of rotating shafts on the same side for mounting the guide wheel (6).

5. A wall cutting circular saw according to claim 4, characterized in that: The control button (3) is electrically connected to the drive motor (8).

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